So, I'm becoming a huge fan of the Sega arrangements from way back when...any more albums with arrangements like these?

Well, the most similar types of arrangements are from the SST Band, on the G.S.M. Sega albums: http://vgmdb.net/search?q=g.s.m.+sega

Gamadelic is well worth checking out, although their arrangements are spread rather thin. Buying this one will cut down on the searches: http://vgmdb.net/album/1105  You'll still need Gun Hard: http://vgmdb.net/album/3293 which has my favorite Gamadelic arrangement.