84 year-old cousin has had a Shaw DuAll for decades - I'm uncertain the vintage - Briggs ZZ engine. I've been trying to help him locate NOS or suitable substitute front oil seal for the Briggs, that let go just recently (catastrophically, but engine is OK). No Briggs P/N's that old out there (have the manual) that I can find so far, and searching through seal manufacturers listings has been a dead-end (even using just the dimensions).
Wondered if anyone on this forum can suggest any sources for vintage Briggs parts?
Thanks in advance for any ideas!