Right so I'm redoing my pickup. Need new seats but do not know what fits plus I want to lower it but don't want sump hitting plus is there a air ride kit out there?

is it true ford focus fit  pickup 1.9d suspension?

Air ride will be silly money. Mk1 ford focus front coilovers will fit will slight modification. For the rears you need springs from an audi or something i think, have a read of the pick up lowering thread in the guide section.

As for seats you can make pretty much anything fit if you modify the subframes, cut and weld etc