Aftermarket power steering pump?

What year, model, and engine are you working on? Usually the Saginaw setup is more trouble free than the Federal/TRW style pumps. To convert, you would have to have all the brackets and hoses with the pump, and the correct pulley for your application. Sometimes those are made of unobtainium in some years/models/engines. There's always some aftermarket setups, but, they can be pretty pricey and many require other mods to get them to work.