Originally Posted by
ThermionicScott
Those would be my suggestion if needed, but sadly the maker passed away earlier this year. Maybe someone else will step up...
That's very sad indeed, it still looks like there are a few left on Jan's site.
On vintage bikes these are called 'flint catchers' so you can sometimes find used ones, because of l'eroica probably, on the Italy Ebay site by searching for '
flint cacciatori pneumatico'.