If you don't mind doing a bit of desoldering/soldering and getting a few new keycaps, the Poker II PCB does support the ISO layout. You will either need to run it plate-free or get an ISO plate for it.
Edit: I just noticed dorkvader mentioned this. But modding it for full ISO support is not hard, just desolder everything to get rid of the plate. Or desolder a few switches and cut a few holes in the plate. All you have to do is select whatever layout you use on your computer to make it run on your layout.