I got one from Alan Schofields a couple of years ago. It was newly powder coated and cost about £60 if I recall correctly http://www.alanhschofield.com
to be fair ive only looked on scofields web page thought i would ask here first im in no rush but thanks for the info i will have a look there is a few on fle bay
Southern Kombi Parts are now Sussex Kampers Ltd - I got one from them last year. They usually have one or two in stock.