Sovereign 2000 Dealers in the US?

Just wonering if any dealers in the US (or Canada) stock Sovereign 2000 resin accessories? Mail charges out of the UK are unacceptably high these days, and they have a set of replacement wheels for the new Airfix Cromwell kits. With postage, though, it’s literally cheaper for me to buy a complete Tamiya Cromwell at my local dealer just for the wheels.
Airfix has added several features not available on the Tamiya kits, but in a bizarre cost-saving measure, each wheel has six bolts instead of eight, and it’s really, really, obvious (some have speculated that the tooling was done by Academy, but that’s not confirmed).