Have you tried Alibaba.com? You can search for 'veneer' and find plenty of companies around the world who are very willing to sell you veneers and very willing to work with you to get you what you want. The downside is most require pretty large minimum orders..

still, a fun site to look around..

: A retailer finally gave me an answer different from "i wouldnt
: know". So for future reference: Best quality "paper backed"
: veneers have a resin saturated backing, that is half the thickness of the
: whole material, more costly than raw veneers, heavier at the end but would
: not delaminate.
: Cheaper than raw "paper backed" veneers use whatever adhesive and
: there have been complaints from clients exactly because of delamination
: problems.
: None of the two is worth it.