Where do I find early CB350 fork seals?

[caseyjones]

I'm helping a buddy build a 71 CB350 (with the early-style forks that pull into the top tree). The old seals are NOK TC4y 33-44-8. All of the seals I'm finding for sale are 33-46-10.5 to fit the later style fork tubes.

Anybody have a source for the early, smaller seals? I have an early bike, too, so I have a vested interest.

Thanks in advance,
Casey