Tail lights behind custom cutouts, what to use?

OK, so I am thinking about doing some custom tail light cutouts in the roll pan. LEDs are to small, what would work?

Trailor lights from wal*mart work.

On my old 85 Ram 50 back in the day I had 3 slits for taillights in the rollpan with 1974 Mercury Capri taillights behind them. The taillights had amber turn, red tail and brake, and reverse lights all in one flatlight and were easy to mount using two bolts that grounded them.

you could us the buckets from like an early 90's chevy fullsize headlight or corner parking /turn light.

Old school Suzuki Samuri.s have a flat tail lamp with seperate turn,brake and backup lights and they are flat on the face. Shouldn't be too hard to drum up a set of them from the wreckers.