Do you need the single or two-lamp bulb housing?
It must be Three-lamp housing
I believe they came in single or two bulb configurations only.
He's probably including the backup lamp.
You'll be hard pressed to find a NOS piece. Your best bet is to find a nice, non pitted original and have it rechromed, if required. NOS lenses pop up on eBay from time to time.
Found NOS left side and right side excellent, "me happy":sFl_america2:
does a 1964 grill emblem fits the 1965