I saw this being performed on Alex McCord during an episode of The Real Housewives of New York 2 weeks ago. It seems popular in LA and New York but I've googled to death and still can't find anybody who offers it here in London, let alone the UK.
Hi Peachtwist, There are 7 locations on Wahanda that are showing they offer this treatment in London. Unfortunately not with prices but you can access their locations and telephone numbers from the link attached. Good luck and let me know how you get on as sounds interesting.