Chev C60 Power Steering Pump

[atridox]

I realize that this might not be the ideal forum, but I am desparate! I have a 1987 Chev C60 with a Chev 350 engine. I need a new or rebuilt power steering pump. I have searched high and low. Chev discontinued making this particular pump and I can not seem to find one in salvage. The pump on this engine is one that has a direct fill. Does nyone know where I could find a new or rebuilt one? Is it possible to get my current pump rebuilt so that it will not leak? Any help will be appreciated.