Mary -
Laura from Lucy's Fabrics will order the leather/pvc grommet tape if you just go to the website and send her an email. Tell her Ariellah sent you...heh.(but seriously, tell her Ariellah sent you) She has been toying with the idea of doing another shipment, but doesn't know if it would be worth it...
just an fyi...

Danger Danger Will Robinson. The pleather tape from Wal-Mart is CRAP! Use it for decoration only and don't use it for the edges of any belts/bras/anything you want to tie to yourself. What a mess.

hmm, can't seem to get the site to load...

You can punch your own with this pattern... which is nice.. but I don't have the right stuff.

I do. All my grommets are put in place by me... Never even thought of that one could by them on tape til I saw the subjects here on tribe.

Definitely don't waste time and money on the cheapy grommet tape available at the fabric store if you intend to use the grommets for more than decoration. If you wish the grommets to be functional and bear any weight (and if you intend to lace two pieces of fabric together at all, you do), you will need a better option.

Of course, I not only punch and set my own grommets (not with the puny punch/setter tool and crappy grommets in the kit sold in the notions department at the fabric store, but with the heavy-duty industrial style puncher/setter (made of iron and designed to be mounted on a worktable, available for $60) and the 2-piece grommets I buy from Lacis in Berkeley (available online (www.lacis.com) and via mail-order (3163 Adeline Street, Berkeley CA 94703, USA FAX: (510) 843-5018 PHONE: 510-843-7178 Mon-Fri 9:30AM - 5:30 pm PST) if you live outside of the SF Bay Area)), I couch them, as well (thanks to over a decade-and-a-half of costuming for Faire). I also re-enforce the area I am punching by sandwiching a layer of canvas between the different layers of fabric, which gives the grommets plenty of fabric to grip onto so that the grommets are permanently secured, and reduces the likelihood that they will tear out.

Tempest mentioned sewing miniature washers onto the fabric. This is the approach you would use if you could not find appropriate grommets or tape, and actually is similar to how eyelets for lacing were created before the use of grommets. To try this, place a single washer over the spot through which you want the lacing to go, or place a washer on either side of the fabric over that spot (more secure). Couch over the washer by bringing a needle loaded with embroidery floss (or crochet thread of a simliar weight) up through the hole in the center of the washer, then down through the fabric again just past the edge of the washer. Eventually, when the metal of the washer has been completely covered by the thread you are using, use an awl (or similarly-pointed tool, such as a knitting needle) to poke the fabric in the center of the washer out, leaving a neat hole for lacing. If your fabric is of a particularly loose weave, you may wish to dab the thread with Fray-Chek, or similar product, to re-enforce the point of the garment that bears the greatest friction and keep it from fraying after the lacing rubs up against it for awhile.

Barring that kind of painstaking handwork, I would suggest you look for grommet tape made from twill or similar materials. Lacis has two types in its online catalogue: one with ("heavy-duty eyelet tape"--$7.50/yard) and one without ("lacing tape"--$2.00/yard) casings on either side for boning. Both are available in both white and black. Of course, these items may be available from other sources and for a different price (such as other stores and online venues devoted to professional costume construction and corsetry), but Lacis was local to me when I began costuming and currently has free shipping (after their nominal handling fee of $4.50).