Thanks for the pictures chaps, I decided I should sort this out today, so I did a tour of all the local exhaust places and some motor factors too. Strangely none of them had sections in stock, and very few had any scrap stuff. As a last resort, I went into kwik fit, and they were more than happy to let me rummage around thier scrap area. I managed to find a very nice looking system which had a really long run of straight pipe, and a couple of bends, and to cap it off, was stainless. It looked about the right size and must have come of some high power saloon car. Anyway, I hacked the backbox off one end and the flexi joint off the other, and they were more than happy for me to take it away! Result.
Got home, hacked the back box of the disco, only to find that not only was my bargain bit of pipe about the right size, it was the perfect size to just slide over the existing pipe - double result!
So this is what I ended up with:
The hole is a little low, but thats just where it ended up! I havn't decided if I ought to do something with the edge of the hole in the panel yet?
The new bit is just held on with a couple of exhaust clamps (bringing the price of this mod up to £2.96 for 2x57mm exhaust clamps from Halfords). The fit on the pipes was so good I was utterly amazed!
The old hanger was used - bent a bit, and welded to the new pipe. Seems to work well.
Cheers
Mark