I think it was drivetrain.com that I bought a complete seal set for my 205 for.
I posted up about the seal/gasket kit awhile back, the only bad thing was the shipping was as expensive as the kit itself. Still cheaper than buying the pieces from any other local place.
If you can get the GM part numbers, they might be as cheap from gmpartsdirect as buying a kit...I know the single gasket I had to buy locally cost me more than GM charges for a 6 pack of the same piece.