I have one with the correct shouldered bolt for £40 posted but then again I expect you will buy the one for a fiver
the bolt is smooth where the wheel sits and the thread part is slightly turned dowm (thinner) if i recall.
I put one on eBay last year and it went for over £50. I've sold a couple for £40. I'm not telling you your under selling it. If the other chap doesn't take it I will.
There is a few themostate and brackets complete for sale by a ebay seller! have just bought a spare with cable for £23 delivered! The seller might have some wheels?
I've got a couple of full thermostat sets, ie thermostat, bracket, cable, wheel, but I'm going to hang on to them, because you can guarantee that when I need one they'll be going for hundreds.
I think it's out of order to buy something from someone on here with the intention of selling it on at a profit. I must make a mental note that if I ever have something you've asked for, not to sell it to you.