I've got mine on an ATG Vintage Racing strap:
The difficulty with these is that the lug size of 19mm restricts the options available - ATG may have some 19mm straps in stock, but they're hard to find.
I'm not sure if that's going to help or not. Have you tried Watchbandcenter in Germany? I'm not sure of the website address, but if you Google Watchbandcenter it should come up.
Regards
Ian