Banks does support their old stuff, just maybe not as well as we would like. When I needed o rings and a drain grommet, I called and it took a few minutes for them to find what I was looking for but they found them and I got them for just a few dollars. The number is 800-601-8072.
I'm going to call them when I think about it and see about a y pipe for the zf. I'm not sure if they still sold this style turbo when zfs were available. I was also going to look into if there is any similarity between the sidewinder and the old style up pipe, might be the same.
I don't really know how the other turbo styles compare, but this one seems like a royal pain on all fronts. I really don't care for how the air cleaner and all that cover practically everything in the engine bay. It takes 10 minutes to take everything apart and longer to put it back together just to test glowplugs or investigate a simple fuel leak or something.