As above, there are a few aftermarket manufacturers, so yeah it's possible!!
There are probably more threads on the subject, but
here's one
This is everything that you would need, to equip your GX470 with our JW Offroad 2.5" Spare Tire Carrier with the Center Backup Camera relocation mount. This shorter version will allow your wheel to sit closer to the body of your vehicle. This bundle will work for those with lower to negative...
www.jwoffroad.com
Please call the front office for payment on product.
www.accgarage.com
IIRC, Becky (AC Garage) was the first.
Consider how big of a tire you want to mount, stocker, or upsized to 33" or 35", weight starts messing with hinges and sheet metal.
I'd love to hear more longer term reviews of the different aftermarket kits available here!! I'm considering a door mount, but wonder about compatible fitment with a Gobi ladder...
Overseas , some Prado 120s had tires mounted on the rear door stock (and i think those rigs had a higher capacity or aux tank in the spare location stock). Those Prado rear doors differ from teh GX rear door, AND some prado 120s did NOT have the tire mounted on the door, and those doors seem quite similar tot he GX USDM rear door.
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