I haven't looked into pricing, but these are the steps Statllers used (they have 2 hybrid K04 Edition 30 cars - one DSG and one manual)
K04 goes off to be hybridised - needs to be a "good" K04 turbo with little or no play in the compressor wheel shaft
GIAC hybrid file
RS4 injectors
VF intake - file is tuned specifically to use the VF intake diameter
Uprated "in-tank" pump.
Normal stage 2+ bolt-ons like turbo-back exhaust uprated and HPFP - an uprated intercooler would also help keep those pesky intake temps down.
You'd have to phone Steve Jr at Statllers to get an accurate pricing - I'd just be guessing.