I'm looking for a replacement crown for my Benrus Sky Chief, Valjoux 72 version. The original crowns on these were unsigned, so it doesn't necessarily need to be a "Benrus" crown, but need to find the right size and right look in steel. An old post on another watch forum years ago mentioned that the right measurements are:

"kelbert case 6.8mm crown width 2.28mm crown thickness.. 1.20 stem. 2.28mm post ht. 1mm post sticking out of crown bottom."

I don't see anything quite right - Benrus or otherwise - on eBay. Would be appreciative of any suggestions/help. Thanks.

Mark