WRT Perlon, has anyone tried the Zuludiver? It's on sale at Watchgecko for the next week:
https://www.watchgecko.com/zuludiver...ustable-buckle
Personally I suspect these are normally a bit overpriced, so the sale probably just brings them down to a more sensible cost. The hardware looks better quality than Eulit though. I'm not sure about the "footprint" pattern, but the plain ones look OK.
WG sales do tend to be fairly legit when it comes to discontinued lines, although I don't think that's what these are. I did pick up some proper bargains last year. If I spot anything else to make it worth the postage cost, I might take a punt on one of these.