The previous owner installed the spare tire on the bonnet. I'm putting the spare back on the rear. So here is the mount for sale. It looks pretty new to me and the 90 was always garaged. Apparently there are two different mounts: one for steel wheels and one for alloy. This ones is for steel. Rovers North sells it for $362. Yours for $250 plus shipping.
I've got no problem keeping my truck warm in Moscow - a V8 defender doesnt have problems warming up the cabin. Even if your heater blower stops working, you've got two toasty catalytic converters right under your toes.