Yes, those are the ones I mentioned (or very similar.) There's definitely some of the US guys with those wheels on their carts. I think someone on the FB page might also have bought a set too. Shouldn't be too hard to get them fitted up.

Yes I got two of them for starters, They look nice and strong with off road tires. Going to change the bearings out for 35mm X 16mm so to fit axle bolt. To drive the one wheel I'll use aluminium gocart three stud wheel hub with an adaptor plate to suite my 100mm X 4 bolt spacing on the wheel brake disc hub.

A lot of the guys in France and UK use these wheels. I believe there may be a 4 stud hub from an ATV that will bolt up.

Have bought something very close to these, 4 of them and have larger bearings than the 12mm to put in. Still collecting bits at this stage.