Its not the wheel carrier bracket thats the issue, it's the door itself. They have a reputation for cracking when subjected to corrugations while bearing the load of the spare.
I suspect this is actually less of an issue with Pumas as the door is now all steel - but only time will tell. Larger tyres/steel rims obviously exacerbate the issue.
As much as I hate playing a conservative game, my recommendation would be to get yourself some more aggressive 235 or 265 tyres, possibly on a second set of rims, and leave any further wheel/suspension/drivetrain mods until you're out of warranty and know the vehicle better.
At that time I'd suggest a quality 2 inch lift, DC front prop, lockers/ATBs, replacement trailing and radius arms and a set if 255/85 MTs.

