The stop light housing is 4and 1/4 inches side to side(top to bottom) and 2 inches
depth. It has a metal stop inside on top with tag light below. The lens was red glass
with slots on each side held by two screws on out side cover. Thanks for your replay.
George
I did some checking today. You are looking for the dealer install brake light with switch combo lens. I have a reprint of the Model T parts catalog put out by Ford in 1928 this lens is not listed. Ford may have not sold that many of the setups between March of 26 and the end of production in 27 to warrant carrying on the replacement lens. You might also keep your eye on ebay. The complete lamps do come up but are not cheep. You might try also posting on the other Model T sites.