As most will know already Volkswagen's own panels for both the T4 and T5 Transporter range are prohibitively expensive a lot of the time, resulting in most opting for "pattern" panels from teh likes of Hadrian [and other manufacturers] the main problems with using such panels is teh tollerances in their overall shapes and sizes are often knowhere as close or as good as Volkswagens own thus requiring loads of "fettling" to get them to fit correctly as they often don't....
Below you will find links to the body suppliers we are aware off if you know of any others feel free to add them, but please keep any bodywork related threads to teh bodywork section in our forums where we will do our best to answer......