D7 17A hydraulic pump

A freind of mine has a D7 17a with a straight blade. He showed me the hyd. filter today when he was changing hyd.oil. It has some brass filings on the filter. I told him it looks like the pump is going out. Is there a source where he can get a reman or a good pump to exchange? Or are we better off to take it apart and and get parts to do it our self if parts are available? What are the parts source besides Cat?
Sorry for the million Questions!!

Thanks!!

I found General gear in Idaho on line and gave my freind the #. He called and the guy said he would call right back, He is still waiting for a call back since Thursday. Is there any other sources or possibalitys?

I show that to be a Cat #46 pump. serial number 48C1-up @ 100 gpm
Pump group # 4H3689

It is a Vickers rotary vane type pump.

Try
Attica Hydraulics
Chesterfield, Mich.
1-800-422-4279

Ask to speak to the owner as the gals on the order desk probably won't know the old stuff.
I have bought #44 cartridges exchange, don't know if they do the #46 or not.
Service & product has been great once you talk to the right person.