A thought that comes to mind is CarbonLib.
If I'm right, you'll to experiment a bit, say, PCMCIA drivers from SSW 8.1 or 8.6, Finder from SSW 7.6.1 and System from SSW 8.1 as well CarbonLib 1.0, 1.1 or 1.2.
If I remember correctly SSW 8.1 supports up to CarbonLib 1.2.