Crown Part Number Search Request (Found)

Hello All,
I have a Cal. 1001, Ref. 168.047 that I need a stainless crown for. I have a yellow crown, but am putting it in a stainless case. Offrei lists the gold one as Genuine Omega Yellow Crown Female 4.7 mm, 8100/1218y. Hoping to find a stainless one but need to know diameter and tap. Photos of the gold one and the reference follow. I can live with a different crown as long it is stainless and fits. This is not a WTB, but a request for information. Thanks in advance.

I think you need a ST42530, but there could also be a replacement part number that would fit as well.
https://www.cousinsuk.com/sku/details/omega-case-parts-search/42530st

Thanks, I didn't think to try Cousins.

Update, thanks to @rendo, I was able to find one on eBay. All sorted now.