Wanted: NOS rear main seal L134 "Go devil"

[Speedy]

Hi Rob,
that is exactly my concern, I would like to get a seal that will not ruin my engine. how can I find pre 1990 seals (what do I look for on the package) and id still feel concerned about ruining a good running motor.

I have one engine that is original to my 1947 CJ2A.
another Kaiser Supersonic engine out of a henry j car that for the time being will be put into the CJ2A
and one willys MB engine, that wont run anytime soon.

if you cannot say the US company that has nos seals could you pm me?
I hear Payen seals are good and reliable.

help me get my engine running again safely