Not sure if this is what you want but have a look:-
http://www.lindy.co.uk/computer-tech...set/43011.html

and this forum might help:-
http://forums.hexus.net/help-technic...rewdriver.html

quote form this forum:-
B&Q, local hardware store, Asda, Homebase etc.. all only had the size 0 philips screwdrivers. I eventually looked in at the big Tesco's here and amazingly they had the same pack (from the same manufacturer) as Asda, but, with an added size 00 philips screwdriver that I was after. I think I'll just go straight to Tesco from now on.. they seem to have everything

or:-
"Halfords have a set of 6 flat and 6 phillips down to 0000 but they're £15 a set!"

or this:
http://www.maplin.co.uk/Module.aspx?ModuleNo=223453
from Maplins "Includes slotted: 2.0, 2.5, 3.0mm and PH000, PH00, PH0"

Dan

EDIT found these last week when I thought my screen had a problem! turned out it was me with the problem so didn't buy and therefore can't vouch...