Hi Martin,
I got mine from TC Charger, 1500w was about £250 delivered. You'll have to email them for pricing. I'll vouch for their service.
Took around a week and a half to arrive, no paperwork whatsoever.
http://www.tccharger.com/english/ProList/T34
Otherwise GWL power sell the same chargers for a little more but in the EU.
http://www.ev-power.eu/
Don't know about their service but a little steeper on price than going direct.
