Hi Mark,
If the wheel/rims size and style are the same, same off set , same stud pattern but the camper rim has a larger center hole, at a pinch you could use the camper spare to get you out of trouble, particularly if you had a couple of tap in spacers made up that fitted over the center hub of the Pajero with the O/D ( outside dimension ) turned to be the size of the I/D ( inside dimension ) of the camper rims center hole.
As I said at a pinch you could get home or to a tyre repair shop.
cheers duggie
Ps, There are a hell of a lot of 4 x4's out there with illegal body and suspension lifts,illegal tyre size eg 35,s or bigger, illegal fitment of spot/driving lights and so on . Never get looked at , so with the spacer ring between hub and rim center as a emergency spare you would never get looked at. There were some brands of rims sold that have center spacers come from the factory.