Will try and find a number for you in the morning Pete, send me a PM to remind me mate....I have dealt with a guy in Slacks creek for a past ride i had.
Never mind. Over taken by events. A Mod cound close this thread or change the title so we open up discusion on rust treatments and repairs and how to go about it anywhere on the car.
They don't have much of a problem with rust normally. In the UK where they use salt on the roads fairly heavily they tend to rust first on the rear wheel arches and on a few bits of the underbody such as on the boot floor.