Rob, I don't know of anyone in the UKicon that markets that specific make of repro tin, but you can also get either square or rounded tins from AAS in Franceicon. I googled 'AAS Militaria France' & it took me straight to his web site. The only problem is that his are rather more expensive, at 185 euros for a square tin & 195 for the rounded version.

Happy New Year & ATB.