it's not frugal, My wife calls it "cheap":lol: I call it using what I can find that might fit.
early dodge rams,96 on up to 2008 dakotas (pain in the rear to get out) late model vans. Ebay (92 dodge ram) Salvage yard is the best.
take a tracing of the power window motor bolt holes from the removed vehicle if you can. Tack the plate on and test first since you might have to clock it a bit to clear stuff and to get enough window adjustment.