You can pretty much rebuild a Pok3r with all new parts, right? Bottom cases are just the beginning, if you really want to you can desolder the switches and LED's...?
What about the PCB, can you replace that?
I mean, if you are planning to rebuild most of it, you might as well get a cheaper board, as you'll have to spend money on quality components. Replacing PCB would pretty much be same as getting a new keyboard, considering it is the root for a board.
For example, check out KBP V60(can't stop sharing the board
). It's cheaper, and pretty much same as poker, just not programmable(not at the moment, but I am getting close to making custom firmware). There are definitely other similar boards, and if you are a hacky person, that likes to modify everything about a keyboard, then why not?