I'm thinking b-body wagon?

Since Mopar sold them as assemblies, the individual numbers are going to be hard to find.

back-up lamp assemblies WAGONS:
'66-'67 b-body - #2585 027
'66 c-body - #2449 508
'67 c-body - #2606 496

'66-'67 Charger - back-up lamp assembly - #2606 002
I don't think this is it because the CHARGER back-up lens doesn't have the "bullseye" pattern)

What year is your wagon?