I bought a Protect a Bub sunshade - fits my Maclaren a treat but not sure about an off roader - you can always google protect a bub and see what they say about which buggies it fits
The only drawback is that you have to tie it onto the buggy and also take it off before folding the buggy to put back in the car, but I've found it so much better than a parasol as you are not constantly adjusting it when the sun changes angle and the baby is still able to see out and enjoy themselves
Hope this helps a bit