Every cage here is HDPE.
These are Pro-Line cages from Constrictors NW. Ed Lilley no longer makes these cages, or cages period.
The only other HDPE maker I know of is Monster Cages. Mathew Martin is still in business I believe.
I have really enjoyed these cages and have no regrets going with this material.
You may fill a niche if you go into business as I don't think there are many cage makers using HDPE.
All of my cages are naturalistic and set up for display, yet they are still easy to clean and maintain.
Best of luck.