Hi Rik
I've been using a 12 inch length of Drennan Green 24lb 7 strand Pike Wire, attached directly to the fly with Trace Builder 50/60lb monostop crimps, which are tiny. At the other end attach a size 16 barrel swivel and you're good to go. I tie the traces onto the flies before fishing and swap trace + fly.
Fulling Mill do a good range of pike flies. Been having a fair amount of action on 'Special All Pearl' - look at page 48 of the catalogue which you can see online here:
Fulling Mill Catalogue 2009
I suspect this fly's success is because the prey fish in the waters we've been fishing are mainly grayling, roach or skimmer bream, and I'd pick a fly that looks most like the bait fish in your water.
Hope that helps
Mal