For anyone in Melbourne who is considering installing AC in their bristol I have found what I believe to be a good resource.
His name is Las (Laszlow) Molnar, his company is Autobreeze in Oakleigh. Tel +61 (0)3 9563 3195 or
autobreeze1@bigpond.com
He has just done some work on the AC compressor on my Mercedes and I was extremely impressed with his work and his can-do attitude.
I got talking to Laz and discovered he has experience developing custom auto AC systems and he would be happy to take on more of such work. I get the impression he's the sort of guy who is willing to tackle pretty much anything, although he has particular expertise in AC.