Finding the "tall, zombie-style glasses" is going to be tough unless they're custom made. I don't understand why the ones that Ted Lesley made from Lucite tubing didn't work well in performance (see Bill Palmer's post above. I too would be interested to hear back from Bill about why these didn't work as expected.)
If you were able to scrounge up three sets of glasses and gimmicks from the old Liquid Appear (D. Robbins EZ Magic) they would work , BUT remember:
Most of us are enchanted by that evocative Jim Steinmeyer illustration in the Wakeling book of the suave magician in tails (Wakeling) striking a pose whilst holding the three tall "zombie" glasses between his fingers . But let's think about it:
The gimmicked glassses that were commonly available for Liquid Appear were usually not tall "zombie" glasses. They were rather plain , straight-sided glasses , more like something you'd see at the Woolworth's lunch counter , not a ritzy nightclub like Ciro's . However, those old Liquid Appear glasses would work and the effect that Wakeling came up with has a great plot.
Nowadays, you can get the Liquid Appear type of gimmicked glass from Bazar de Magia , in an effect they market called Comedy Glass in Paper Cone
. Buy three and you've got the gimmicked glasses for Liquid Sands. These glasses are plain, plastic tumblers, not tall zombie glasses , but if you can work with that kind of ordinary, every-day looking glass then the Bazar de Magia gimmicks should do the trick.
If someone could come up with a gimmick that would work smoothly with with the taller zombie glasses it would be a cool looking effect , especially if they were light-weight lucite so all three glasses could be held between the fingers for that great display suggested in the Steinmeyer book !