I can generally source most brands of popular pickups.
But... for your special guitar why not consider some really special pickups?
I stock a range of John Benson's wonderful pickups that he hand-winds in his upstate New York workshop. Together we have even worked up some custom Strat sets especially for the UK market, designed to recreate the tone of Clapton, Gallagher, Gilmour, Knopfler, Marvin, etc. See the full Benson Custom range here.
I can also thoroughly recommend two pickup makers who are more local to me, but are developing an international reputation.
Mojo Pickups are hand-made by Marc in his workshop at the southern end of the Yorkshire Dales. He has many innovative designs as well as standard types. All are made with meticulous attention to detail and outstanding quality.
Jaime at The Creamery hand-winds his pickups in South Manchester, and has an awesome range and an impressive client list. Check out all the options and reviews on his website.