I build reptile enclosures as a side line and I can promise you that here in Canada, PVC sheets are almost impossible to get at a fair price. Therefore, only a few Canadian companies exist for PVC cages. I have no doubts that PVC is amazing, but at the end of the day, you we simply do not have the same luxury as our american brothers. Therefore, I build mostyl melamine and plywood caging. If you do it right, they are very sturdy and very resistant, it just takes more knowledge and time then slapping a few PVC pieces together !
That being said, I wish we could find a PVC supplier !
I would recommend you go with a used PVC cage. They are rare, but you can manage to find some on the market coming from breeders and big collectors. Thats my advice if you absolutly want PVC.