Honda Automotive Parts
External seal is part number 6. Internal seal requires purchase of distributor assembly, pressing off parts to remove the shaft. You could probably find a seal outside of normal parts channels, but then you would need the shaft bushings and possibly the shaft itself.
I might tackle that job if the distributor was on a 32 Duesenberg, but for anything where I could order a reman replacement, I'd pick up the phone, or go to a pick and pull and hope I got lucky and the one I grabbed (assuming there was one) was in better shape than the original.
The illustration is for a VX which changes nothing.
regards
mech