Here's some pics of my solution to the problem of trying to get a pipe from the wastegate down past everything so I could plumb it back in.
I got a length of spiral stainless flexi tube (the sort of thing trucks use for the flex in their exhaust pipes, but much much smaller) that fitted tightly over the existing outlet pipe, it is clamped by a stainless t-bolt clamp at each end, and it's flexible nature allows it to easily thread it's way past everything. To make a hard pipe fit through here would've required at least 10 cut and welded joints.
It still comes really close to the oil filter, alternator, dipstick tube, and the intercooler hose, so I had to heat wrap it. Short spurts at full boost didn't seem to cause a problem, but whether this is sufficient to keep everything from being toasted under harsher use I don't really know. I think the alternator wiring will probably melt before anything else, so that should bring up a warning light before anything else dies. :lol:
I got the idea for this from an old car at a Car Museum, which had similar flexi tube with clamps at each end where the exhausts came out of the side of the engine cover and curved down under the running board.
Also swapped a non-sticking caliper from my other vr4 today, seems to have cured the problem, though I really need to bleed the brakes properly as they are still abit spongy.