faulkner plastics in hialeah, nice people and if you buy the acrylic from them, they will do cuts for 10 to 15 bucks.
I use weldon #3 fastest setting, # 4 is a little slower, #16 is slowest setting of the three.
I built a 45gal 3/8 " sump - 4x8x3/8 about 200.00 +15 for cuts
these prices were from 2 years ago, also this is for cast not extruded.
good luck