Hi David
I have Tyrons fitted to the 3 'vans that I have owned, and to one towcar, by my local Hi-Q dealer Tyrecare of St Helens. Their prices were always considerably cheaper than the price quoted by local caravan dealers. One local caravan dealer admitted that they would only take my caravan to a tyre dealer and then add their mark up to the price!!!
Sorry I can't remember what we paid for the last 'van.
Although, like you, I am thoroughly committed to Tyron bands I would warn you that they are not liked by Continental tyre fitters. I once had to have a tyre replaced in France and although I left the instructions, in French, when I got home I had Tyrecare check it and they found that the French guy had not tightened up the band, ie, would have been useless if I'd had another puncture. On another occasion in Italy the fitter, although he spoke excellent English, refused to refit the Tyron band and despite my protestations levered it off with a screwdriver/ He then handed it to with words to the effect of "put it in the car boot". Fortunately Tyrecare were able to straigthten and refit it in the UK. I have towed with idea of getting the Tyron "spider" refitting tool to carry with me on Continental trips but it is another extra weight.
I hope this helps
Tim.