I've starting having a problem with the accelerator sticking on my Mk3 in the last week. The cable doesn't seem to move into and out of the housing particularly smoothly but I can't seem to get a replacment for love nor money. The main problem seems to lie with the spring on the throttle body not forcing it back properly.

Does anyone have any suggestions of how I can rectify this problem seeing as though I can get any parts? Or a reliable parts contact?