Originally posted by UserAccessDenied How did you cut yours from a broken Pentax ME Super?!
There are 4 antique shops near my house all have old Pentax film bodies for cheap. Maybe I'll try to pick one up and salvage some parts?
The focusing screen in glued to the pentaprism, you'll need to unscrew the top cover first.
There are several good disassembly guides for Pentax ME Super, for example
this and
this.
After you get the FS you'll need to cut it down to the original K-30 screen size.
Here's a very good howto and several useful comments.