Hi Andrema
I might (very small might) have a handset - but don't get your hopes up - I'll have a look later.

Crystal.. IIRC these have a top hat crystal, so isn't a simple flat one, so that might be tough to source.. maybe Jack at IWW has one, I know he had some for Scuba Pro 500's.
Bezel insert.. again, tough to find, and it can't be pushed out from behind, so you'll need to pretty much destroy it getting it out. I'm pretty sure a Squale 1521 insert would fit - not sure if Squale would supply just the insert though. If they supply the bezel with insert already fitted, then again, it's gonna be hard to remove it without damaging it.

Stewart
Heuerville