Custom keyboard case?

[Gmac]

Hi, I am new to the whole custom keyboard scene. So before I get started from the ground up, making a custom case for a pcb is where to get materials that are used for the case itself. I know aluminum can be used, and I can find that in a scrape yard and melt it down into blocks and use it on a cnc machine. As for acrylic where is the best place to buy that? I've looked online but haven't managed to find a place to actually buy any.
 So I was wondering if anyone could let me know where they get all there supplies from that would be much appreciated!

[Findecanor]

Acrylic is also known as PMMA or as the brand name "Plexiglass". You could get acrylic from most vendors that sell glass, although not all vendors offer it in higher thicknesses.

Other than that, keyboard cases could be built from just about any material imaginable. They are just cases.
I have yet to see interlocking parts of laser-cut plywood. Layered plywood for sure, but not interlocking (horisontal and vertical parts).
Myself, I have mostly rebuilt plastic cases from older keyboards to fit.