Hey, guys, I finally got around to driving down Acme Street and fond Randy, the owner of PLAST D FUSERS SOUTHEAST. He is located at 1809 Acme Street, Orlando, FL 32805, almost the last little indescript warehouse storefront on the right at the end of Acme Street. If you go south on Rio Grand jfrom the the Citrius Bowl, Acme is about the third righ-hand turn on the right. You will think you are lost, as there are no names on the shops, but when you get to nearly the end of the street, there is a sign that gives you a clue. The owner is Randy. He used to be a worker bee and boutght the shop, then fired the boss. Great guy, very local.
He has almost every kind of plastic for flurorescent lighting diffuesers either in stock or can order. He has the black that Matt was looking for. He also has chrome or white and can order about anything that is made if you prefer.
The stuff you buy in HD or Lowe's is styrene whichi is thinner, more brittle and cheaper than acrylic. You want acrylic if it is a shelf for frags, but you can get by with styrene if you don't need the strength like for a top. Acrylic is a little more expensive than polystyrene, I paid $20 cash for a 4x0 of white acrylic 1/2". He does stock 1/2" black, but it is in styrene only, and he can order acrylic.
I really like dealing with the local guys in person, but if you are out of town he can ship. Give Randy a call at (407) 4232-0132 or (800) 992-0132 and he will fix you up.