Is that the one LR sell as the genuine part? If so, it will directly fit, but you will need to drill 4 holes into the bottom of it, and I can supply the relevant rivnuts to fix the guard to (or you can tap the holes, which is more secure).
If its not the LR one, if you can give me the details of the towbar, I should be able to make you a couple of mounting brackets to enable you to fit the guard.
As said, the exhaust is vulnerable, I know a few people who have holes in theirs from rogue rocks and tree stumps!