I believe there was an addon to one of the 2000 accelerators (060?) that was used by Phase 5 as an early develpment system. If you search around you can find pictures of one setup and running. But yes, a PPC for the 2000 was never sold as a consumer product.
There is a video of the board in an A2000 on youtube.
http://www.youtube.com/watch?v=foWfXhmi1wYIt was an addon board for the Blizzard 2060.
