Hi, if it was me, I'd just replicate the original design.
It's not going to break that easily for the riding done on these.
My two 1993 Altitude ones have not snapped nor have they ever moved, but then I've never over-tightened it to cause the front to pinch together and that is with plenty of decent post out and in.
That over tightening is also a known problem with Marzocchi crowns cracking over time.
The two 1993 US and UK race bike had not snapped I looked at a few years back.
For me, the look and original design is the major thing, not ultimate strength.
It's a small part in a much flakier over all bike build with worse parts that will bend and snap somewhere (Syncros post and cradles, Syncros top caps, dodgy sus forks, lightweight rims, Alu nipples,..
)
I get the feeling the others just want a replica for the same reason?
None of what Guinessisgoodforyou matters with these bikes.
BUT I'm not buying, as mine are fine.
(I have enjoyed reading about the process though, it is interesting
).