I cannot recommend them. Google them and see what comes up.
Hmm … scratch that idea, then. But maybe there are other tack stores over there with better reputations that will ship internationally?
Horze has them on their European site, but not the US one unfortunately.
Keep your eyes open, I found one on ebay. Not willing to part with it, sorry!
I have no experience with this retailer, but it’s an American site:
http://www.vermonthorsecountry.com/hermsprengerkkultraaurigan16mmlooseringsnafflebit-3.aspx
I used this bit for many years with my fussy-mouthed TB mare. It’s a great bit.