81210C is actually not an accurate part number.
Toyota part numbers are 10 OR 12 Digits (last two of the 12 indicate rebuild status, color, or trim type)
So what you need is the following:
BULB, REAR FOG LAMP: 90981-13043 12V 21W
Looks like it's just a standard bulb, that fits nearly every new Toyota application in the US likely as just standard reverse lights.
The Rear foglight switch is a little trickier. Since it was never available in the US, the US dealers will tell you they "can't get it". You may be able to source it elsewhere, but I can't verify that. Here is the switch part number:
SWITCH, REAR FOG LAMP: 84165-35010