I've had 2 different sets so far.
I bought a Leighton Vans set for a 1+1 cab - it was very nice quality but the heel pad was in the wrong place
I then bought a full set of carpets from Harrison's Trim Supplies - these have also been ok, but I've never been able to get the corners/edges by the door entry to sit flat. Also, after 12 months the stitching around the heel pad had started to go.
I am considering paying a visit to Rugs for Bugs in Worcester, so they can measure the van and do me a proper custom set in top quality carpet, with all the cut outs for the lashing points, etc., done right.