The ladies dynamic strap is particularly delicate and would be difficult to make, even for a professional. Chunky is not what you need for this model. There are some £15 copies out there but the genuine article is a thing of beauty.
Until last week a UK company called Cousins advertised men and women's straps including an XL size Mike, but they turned out only to have men's and have since changed their add.
It's a strange market that Omega / Swatch guard carefully. I guess they turn up in drawers now and again.
Those metal O rings look like a good option but I've never seen a ladies version, as before you'd need serious skills to make a ladies size.
We feel for you Mike , with two ladies waiting yours is a different dynamic
