I have a WE Tech 1911 that's pretty much dead at this point. I could sell it to you and you can use the parts (assuming they're compatible) and you can just use the rest of the gun for whatever.
kjw is compatable with we, aside from the single stack's lower frame(the kjw has a circular widening for single stack co2 mags) and the tactical 1911 is fully compatable with the we hi-capa.
it says for we/meu/kb, but i'm about 75% sure the entire upper assembly(everything held on by the slide pin) is completely interchangable between we single and hi-capa pistols.