I bought the gen because I was reading that the rep ones were easily breaking the spring and clasp. I bought mine on eBay. Here’s the link https://www.ebay.com/itm/Omega-Micr...amaster-Speedmaster-Screw-Style-/153062943521
I had a chance to buy a extra bracelet from my TD when I bought my 43.5 ceramic PO for an additional $100 but l didn’t buy it maybe next time I will.
you can also keep checking the parts blog something should pop up there. Good luck