Service Honda or a vintage race shop for a seal? I believe I have a few 82 CR480 shocks with the same issue! They are a little shorter than the 83. Fleabay is a last ditch shot in the dark for parts. Vintage Bob
I re-built some 70's showa 360 shocks that came off of an mr250 for my mt250 using some regular seals from a bearing shop. i put them together and pumped them up and down for quite some time without a little residue of oil showing on the shafts but as for long time wear i'm unsure as i havn't mounted them yet. i used old mountain bike boots to cover the inside so no dirt will get to the seals. they match my fork boots now!