Michaels does have it (hanging above where the glue bottles are on the shelf) and it is 4.99 at our local store. Before coupon, of course! (Does anyone go there without a coupon???!!!) For some reason, though, never see it at our local ACM...
Many, many (many!) of the Manchester CKC vendors on the show floor were also selling it for anyone who needed it. The description by a pp is accurate - it is basically a clear glue (kinda stinky and stringy, though!) that dries quickly and clear. Many of us were sharing ours around for folks who didn't yet have a bottle...sure you'll find the same thing if you end up at the show without it.
Have fun!