What size are those trailer wheels? If they are the small ones I’ve got 3 you can have as spares. I’ll check the size when I get up. Only difference is mine have tyres on them which I find works better on a trailer. Not only that, if they are the right size I’m driving through Hertfordshire early Monday morning. Maybe we could meet and I’ll give them to you as a Christmas present. No wrapping though
I’m pretty sure they’re 8” rims with 4 stud fitting. One of them has never been used as it was the spare. Looking at your picture above, it looks like they’re the right size.