Evening guys

Im in the process of finding and changing my steering rack on my 53 plate 2.0 tdi. ive been told that its the gen 1 rack thats on the car. trying to find a gen 1 rack is seeming impossible. i think ive found loads of gen2 racks with part number 1K2423051AJ. Ive read somewhere that the loom has to be changed. Can anyone shed any light on how i go about doing it or what the part number for the loom is.

Thanks for your time!