It's not on that list but I highly recommend delviesplastics.com. I have used them for materials for all my acrylic so far and they are priced very well. They only sell cell-cast acrylic as well
I understand the differece between cast plastics and extruded sheets, but often the difference isnt that noticeable, not for our needs anyway, so why do people pay extra (when extruded sheets can often be quite expensive already) for cast sheets??
Extruded acrylic is way crappier to work with. Cell cast acrylic will not melt when cutting on a table or band saw or while gang cutting. Its also more resistant to chipping and cracking. It also polishes better then extruded.
