Star Control II was never released on Amiga, right? How about porting it from the released 3DO sources? It really doesn't need any fancy new effects or features, just the original game.
There is already a project for windows/linux/BSD/mac/BeOS
here. But IMO Amiga version doesn't need any scaling etc so It would work on 020+AGA. I remember the PC version working nicely on my 12mhz 286. The 3DO version also has speech..