I read somewhere that it tends to be luck of the draw if your car has them ,i know I saw a bit on the r32 owners stating that none of the r32 had them fitted even though they had winter packs. It seems odd really, i have a h plated mk2 with heated washer jets!
I believe you can get hold of the loom from the stealer's as well as the jets, don't know the cost though apart from its a fiver a pair for standard. Don't know if you could modify a mk2 loom.