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.