If the leak is the only problem with it I would try resealing it. Have to make sure which rack it is to get the right parts. IIRC there are 2 or 3 possibilities? Cam, TRW, or ZF.
Unfortunately the best rebuilders (Jorgen) recently closed.
Rack Doctor is an option:
https://shop.rackdoctor.net/1983-199...productId=1182