Re: Reds baseball cards websites
If you can get a copy of the Baseball Card Encyclopedia you can find all of the team sets listed in there. It's a bit pricey, but if you're lucky your local library may have a copy.
I can tell you that there weren't any Kahn's sets in the Big Red Machine era, they were out for a few years in the late 50s or early 60s and didn't come back until around 1986. There were other team sets issued during that time though. Kahn's is my favorite set, because they include cards of Joe Average veteran players that no one else bothers with.
I would kill for an exhaustive set of every Reds player. I know the Dodgers came out with a set like that maybe 10-15 years ago, I think it had somewhere near 1000 cards, but I think they're the only team to have done that.