C-172 landing light switch

My '61 Cessna landing light switch has two positions; First notch is the taxi
light, and the last notch turns on the landing light but leaves on the taxi
light. Does anyone know of a legal replacement switch that separates the two
lights? (taxi light goes off on the last notch). The reason I ask is that it
still has the generator and at engine idle the generator circuit breaker often
pops due to the high load and low output. A separating switch would presumably
cut the load way down.

Jim