Front seal
Quick and not so dirty fix: Lucas power steering oil. It took about 2 days to swell up the seal enough to STOP the leak. I used the Lucas on the rack & pinion for about 2 years before investing in a rebuild, would stop the leak there unless parked at full wheel lock. Some one will come up with a P/N for you which can be found at any industrial seal-o ring supply house, that's where the seals ultimately come from anyway. If the seal was out, physical dimensions taken with a caliper of the shaft size, OD & thickness will identify it using a seal catalouge, even if no P/N# is visable. The next choice is of seal material & number of lips.