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If you can figure out the electronics, that's great. If not, you could get a power seat switch out of a vehicle that has a normal setup. I don't know about yours, but there is commonly: seat front/back, rear of seat up/down, and entire seat up/down. In that case there would be three motors that are reversible. A power seat switch with similar gauge wires to what's on the motors would probably do it. This is, of course, if you can get to the individual motor wires without tearing up the seat.
WOW, you just got schooled in Caddy powered seats. How do you feel ?