Hi
Got mine (170's) from a garage in Wem, Shropshire, but can't for the life of me remember the name of it, sorry !
I'm going back a few years now (2003), I paid just over £80 for the pair, before the price's went silly when the big dealers muscled in. They're fantastic lamps, totally underrated. LRO did a feature on the bloke that owned the garage, he had a seriously modded yellow 90, he was also (I think) the original disributor for Lightforce in the UK.
Sorry I can't remember the name of the garage, I've just looked on Yell.com but couldn't find it. I don't live local to it otherwise I'd check for you.