Morning matey and welcome aboard! :welcome:

Fitting cruise control can be a fiddly job and it recommended by a dealer of some sort. But they’ll probably only fit their own ones, im not sure. If you do a lot of miles though they’re a god send. I have one on mine fitted from the factory and use it all the time.
Make sure the eBay jobbies (if you’re going that way) are from a decent place though cos if you get the wrong version you’re screwed.