Update!
Just been up and collected the shocks/wishbones and have ordered the ARB and stuff ill need to mount it. On the parts description, the ARB bushes have "R19" in them so they must be the same after all. All this stuff is due wednesday so ill just need the driveshafts after that - think ill try eurocarparts as they seem cheaper. As for the difference between a R19 driveshaft and a willy one, ive been told (Paul Mitchell) that the willy ones are thicker so maybe you could use them in this conversion. I can only guess that the extra thickness is to handle more torque??
If anyones interested (or might be kind enough to double check my list), here is the parts list below;
77 00 838 096 (Williams Front Shocks) - X2 - £81.34,
60 01 025 842 (Williams RH Wishbone) - X1 - £48.30
60 01 025 841 (Williams LH Wishbone) - X1 - £48.30,
60 01 025 814 (Anti Roll Bar) - X1 - £72.11
Theres also some "bit and bobs" (inc. the bushes) i got as well (asked the guy what would be needed to fit the ARB and was given the following. I could probably salvage the nut/bolt from my existing setup but theyre cheap enough to replace with new so thought i may as well;
77 00 784 170 (Bush ARB R19) - X1 - £5.68
77 00 785 788 (Bush ARB R19) - X1 - £5.68
77 03 002 116 (Screw M8-2) - X2 - £1.38
77 03 035 027 (Nut) - X1 - £0.79
77 03 034 017 (Nut 8X125) - X1 - £0.36
77 00 784 169 (ARB Clip) - X1 - £3.66
82 00 078 548 (ARB Clip) - X1 - £2.79
Total so far is £317.66 from a dealer so could get some stuff cheaper either by going secondhand, aftermarket or specialist (e.g BB). Driveshafts are still to come though......