We used 'Hometyre' as it was far easier for them to come to us. The price was quite competetive. If you are taking the van to them, ring round and get quotes (make sure it is for caravan rated tyre) as the price can vary as with car tyres.
Discounted Insurance Quotes for UKCampsite.co.uk visitors! Up to 12.5% off!
I bought my two from www.camskill.co.uk in colum on left click on van tyres, then select your size, then browse and choose. Price includes VAT but plus carriage at £2.49 per tyre, had mine in two days
I'd take the wheel to a local tyre company if I were you. If you have a caravan dealer nearby, ask which tyre company they use & go there for a price. Most of them can get stock delivered in the same day if they don't hold the right size in stock. Kwik fit do a service where they'll come to you & fit tyres, I'm told they're good but I've never used them.
If you're a member of the C&CC there's a voucher in the current magazine for half price fitting by Kwik Fit Mobile - £10 instead of £20. They did mine yesterday. The tyres were a couple of pounds dearer than I'd been quoted at the local tyre fitters but I didn't have to tow the van down there (no way I could get the wheels off and take them - I wouldn't know where to start!).
We used Camskill are their service was excellent. Had the tyre in a couple of days, and then took round to a local tyre fitting centre who fitted for a fiver