HPS in blue spectrum for veg

Heres a question that Im stuck with:

Where in the U.K. can I find a HPS bulb which I can use for the veg stage (blue spectrum)?

Ive been told the Philips son t agro is good but are these suitable specifically for the vegetative stage if not can anyone make any recommendations.

By the way if your think I should just use a fluorescent or metal halide bulb/s, that is out of the question as I have a different setup which cannot be adjusted

get a mh conversion bulb for the hps

Ed Rosenthal says hps works in veg also. I use the eye hortilux bulb. Works Good

General consensus says MH for veg and HPS for flower. Works fine for me