I just bought enough Deep Sea Alarm's until the original crowns for my personal were complete.
The remainings got sold with a little premium to cover my expenses.
But that's just how it went in the good old days. For the present I have no solution.
Seriously, ask JLC, I once had a basket case watch there which got at least the matching winding/setting crown.
They used the same crown for the alarm and it looked nice. No bezel inserts available, but there is a guy in suburban Paris.
Btw no Weems parts left in LeSentier.
Ilja