Nothing wrong with Toooo smooooth.
The 39 chev lights might be close. It would be worth a call to find out.
If you haven't finished off the housings yet you might make a holder on the
back side to hold a standard 4 inch trailer lamp. something like a bucket that the lamp would set in and be held against the inside of the frenched housing.
a bit of work might save quite a number of bucks and produce the look you want.