Interior lighting

[tempur]

Dear LC enthusiasts, I hate to bother with something seamingly insignificant but I have started to the gloomy dashboard in my 1997 Landcruiser by replacing all the burnt-out lightbulbs illuminating the various switches. I can't seem to find, however, the bulb that lights the left side of the heater/cooler control unit, which has been dark since ages. The EPC doesn't mention anything and I refuse to believe that Toyota would require that an entire unit be replaced if one of the bulbs (the right side is still working) would fail. Has anyone ever had to deal with this? Greetings, tempur