QF...where to get

hey all,

I'm hoping you might be able to help out a newbie to the board. long story short, I have a test on tuesday, and i'm unhappy with my detox so far. i'm not getting great results with my trial run on diluting (i pass, but it's a VERY faint line), so i think i should probably take some QF with me. it's pre-employment, so i don't think i'll be monitored (i'm still going to dilute just in case).

anyway...what site would you recommend making the purchase from. I have to do it ASAP, as with the weekend upon us, i'll have to next day it just to get it by monday.

I really appreciate any suggestions you might have.