It's been a while since I've dropped by but I see there are still some references to SGRaces and variants around here, as well as some complaints that the download links have gone dead. I haven't updated them for Rebellion or anything like that, but I believe they still work for Diplomacy.
The links have been updated in the original thread:
The thread is locked but I was able to edit the OP.
I don't know if anyone is still interested or not but it only took a few minutes to do.