Greg,
Been buying from Regal Plastics on Rittiman Rd for a number of years. A large regional chain they have it all, in stock, or can order. Their scrap pile is through a door between the showroom and warehouse. $2 /pound for scrap.
Plastic Supply on Josephene is a bit smaller, but really nice people. I don’t know what they have in stock, but went through their scrap table (in the showroom) Wednesday and picked out what few colored pieces that were there (amber, green, red, and smoke) am using it for 10bitworks fiesta medals (see the pin board at the space for samples of those colors). Plastic supply’s scrap pile goes for fifty-cents /pound on the top shelf, and $1.50 /pound for the bottom shelf.
There’s at least one more plastic supplier I know of in town. Outside of 35/410 at Rittiman Rd, north on the feeder road, there is a street to the right (east) that goes back into a light industrial park. Down that street and on the right side, sorry don’t recall the name. I bought some CoroPlast sheets from them, but never any acrylic.
Matt