Does anyone sell a longer version of the standard coolant banjo? Perhaps one that goes down 4-6 inches?
For say a gt3076?

 

I'm too tired to direct link you, but Summit Racing sells banjo fittings in the correct thread diameter/pitch that adapt to -6. So you can connect a hard line, or whatever you want.

I just did this myself, I made and ran hard lines a good ways away from the exhaust.

 

Couldn't find anything on summit will keep digging.

 

Reuse the oem turbo banjo bolts and lines, they fit if you bend them. Or just buy M14x1.5mm to -6 AN fittings.