I'm modding a Dreamcast for jamma. It will be powered from jamma power supply and in place of the Dreamcast power supply their will be internal controllers embedded inside the case.
I usually use spacers and standoffs for stuff like this, but I might not have room. If you have opened the dreamcast you know there is a plastic sheet under the power supply. Where can one source a larger sheet of this stuff, so I can cut to shape for the embedded controllers?