Okay, so here is what I am thinking.
I was thinking of buying and purchasing a housing for one of these JROK RGB-Component video encoders:
http://www.jrok.com/hardware/RGBv4/index.html
These are built for JAMMA signals, but perhaps they would work with RGB out from an SNES or other systems with a cable I could make?
I am not sure if there are differences between the 15 khz signals between JAMMA and SCART type RGB, this unit seems to support a combined sync signal, not sure if that would cause a problem?
Any advice greatly appreciated.