Speaking of findings -- would you by any chance know where to find cufflink findings like the sort here or here (warning -- that site has some truly amazing cufflinks -- I continue to drool over these Art Nouveau Lion Cufflinks).

... and trying to find a picture actually led me to a suggestion to search on 'ball return cufflink finding', which took me to pasternakfindings.com and their unhelpfully named "18K Yellow Gold Cuff link- Pair" which look like they're pretty close to the right thing, although totally out of my price range, and still lacking any method other than trawling through pages of google images to try and find them :(