I'd say it is - better bet is to get onto ebay and find a seller called "Wizardbilt" (he's also on this forum). Top bloke, makes a hilift jack rack that fits onto the Disco spare wheel carrier. It's very well made and works superbly, even has a hole for a padlock to secure the jack.
Just make sure you always carry the right size allen key to split the two halves of the rack, as you won't be able to get your spare wheel off in the event of a puncture otherwise. I always carry a set of long allen keys anyway as part of my toolkit. The advantage of this is that you don't have to put a muddy hilift in the back of your car, and any rain on the way home will clean it! :dance: