Acrylic to glass? (the start of a DIY nano)

[iansfishy]

Ive seen a ton of threads with this title, and never bothered reading them. Now as im looking at a empty 40 gallon tank sitting in my house im thinking 30 gallon nano with overflow! (no sump, just two compartments and a return) I want a overflow with "teeth" and the only way I see that is with acrylic. Plus having to drill for a return etc, acrylic would be the easiest. Any ideas would help. As well as where I can get acrylic would be beneficial. Thanks