Working on a 74 Challenger that had been converted from Auto to 4 speed.

Looking for a two prong reverse lamp switch that goes into the trans.
The one in the trans has power going in but no power coming out.
All the wiring has been converted correctly including the reverse light mounted in the dash and the clutch starter switch.

I had no luck sourcing a new reverse light switch.
Can anybody at least have a part number I can interchange ??
Thanks in advance.