Howdy
The TD5 is not the beemer engine! the 6 cylinder 2.5 that was in the old range rover was the beemer engine!
As far as I know, Daveleggy bought the software for most deisel remaps lately! (he's a trader so mentioned him first!)
But also chech out allard aluminium for intercooler kits, and a good bit more, they are a UK based company!
And Martin tracey does try before you buy deals on deisel tuning boxs!
I usually don't like recommending non club traders, but being a landy, I'm sure it's acceptable!
Best of luck!
Dan