I need a front tappered shaft for a 520 bobcat( I believe the same motor on several units from 520 to 643) they are no longer available at the dealer I have check with many of the salvage lots i found on the computer search but no luck. I'll buy the complete pump if you have one. The new replacement one on line says you have to replace both sides because they are different speed. maybe someone has done this and would like to sell the old one. 208 964 0236