My 5+ year old 60gal Craftsman oilless air compressor pump has thrown three set of rods in quick order (why?). Sears replacement pump/motor combo seems too expensive.So, I am looking for a source for a separate pump and compressor to retrofit to the tank. This is for my home garage. Mostly, the heaviest load I use it for are impact wrenches but I do have a sandblaster. I'm thinking 10 cfm at 90 psi will be enough.I'm leery of Harbor Freight and was thinking of Northern Tools or Grainger.Any suggestions and pointers would be very much appreciated.Akron Don Gallimore