I've been searching on and off for an LED replacement for 84999-70070 (8193B in the diagram below), without much luck. It is the tiny bulb behind the heater controls. It would be great to be able to see what I am adjusting at night, haha. Does anyone have an option? Basically a Type 74 Led bulb dimensions: 4.34mm base 16.62mm long2.8mm wide but in 24v. There are 12v ones, but once again the 24v challenge is there.