Fitted a gen wire kit on the last but one Defender,(04 110 DC) cost was around £ 15.00 odd, about 18 months ago, (also would not fit in the "hole" without pissing about !)
When i bought the current one, did not have a towbar, so ordered a gen one, again with the wire kit, around march this year,, came out at £ 60, for the same kit,, so was returned post haste,,
All i can work on, is that, even a gen volvo kit, which has a load more to it, is only £ 20 ish ,
Think LR are having a larf !!