The alternative to camskill is Blackcircles http://www.blackcircles.com/

I found blackcircles to be a few quid cheaper than camskill on the T1-R's (not ordered yet though) at around £64 each.

As for fitting, I tend to take them to a small local garage, its not like much can go wrong with the fitting. Near me I can quite easily get all 4 fit, balanced with new valves for £30.

What did you think of the T1-R's on the ST? I had them on my last car and they seemed quite good.