Yes - those plastic foods you see at every mall. Soups and Crepes made from plastic. Looking for a factory or store selling those. I found some factories in China but would love to get it done localy. Anyone can point me in the right direction?

There's a shop along Thong Lor that sells them. It's about halfway down on the left if coming from Sukhumvit.

I realize that you are asking for a resource in Thailand. However, I would definitely recommend that you buy this stuff in Japan. In the old part of Tokyo, not far from Hakuzaki, there is a whole street full of 20-50 shops selling these things. From the incredibly high end, to the more affordable. As you are (apparently) a pilot, if you fly to Japan it would be a simple thing to pick it up there.

The quality is breathtaking. It really looks like the real thing. Some of the things I see here are quite clearly fake. But these things, fish, sashimi, noodles, look like you can eat them.

Just my advice.

I've been looking as well up here in Chiang Mai. I guess I could go to one of the restaurants and ask.