Disco 2 Uprated rear bumper

So here's a quick question for everyone that's spent many hours trawling the interweb for these things.....

I'm looking to replace the standard bumpers on my 2004 D2 facelift with uprated steel / off road ones.

Ok, so this seems simple enough and there's a huge range available (well huge range for the front and a few different options for the rear). However, I've got parking sensors fitted and I'd quite like to retain them.

I can't find an option anywhere that comes either with sensors fitted, or with the fitting holes ready to refit the original sensors. Has anyone found one? If so, where should I be looking?

Alternatively, if I look at something like the Terrafirma one from Frog's Island then how / where do I retro-fit them and would the jacking points and shackles get in the way / cause and issue with the sensors thinking there's permanently something in the way?

And just to complicate things further (I don't like to make things easy!), I've seen some D1 models that have the corner pieces integrated into the bumper rather than having to retain the plastic caps. Is there anything like this for the D2?

Any suggestions or anyone able to point me in the right direction???