Aftermarket 1450 bracelet OEM Omega clasp options - milled and clamshell

Regarding the 1450 bracelet available from Forstner and Uncle Seiko:

1. Are there any modern day Omega OEM milled clasps that fit? (I'm aware there is a Forstner milled clasp, but want to see if an Omega signed one will fit.)
2. Other than the 1162, are there any other currently produced Omega OEM clamshell clasps that fit?
3. Does anyone know the SKU and price of the 1162 clamshell clasp?

I contacted Forstner and they said: "I’m actually not sure if the OEM Omega milled clasps will work. The key is that the front part connecting the bracelet to the clasp should accept a 10mm link, and the back end of the clasp with micro adjustment holes should accept a 16mm bracelet."

I've read that they clasp on the new 3861 Speedy may be 15mm. It appears from Forstner's feedback that a 16mm milled clasp would be required. Does Omega make a 16mm milled clasp?

Thanks!

Has anyone added an Omega OEM clasp to a Forstner or Uncle Seiko 1450? If so, which Omega clasp did you use?