The original style round were Lucas. Finish Line has them for about $49ea. Or, you can save some money thru FFR @ $29ea., but they are not Lucas. The red from FFR look very close in style to the Lucas. The FFR amber are a different style on the bezel and lenses. The FFR are DOT approved, if that makes a difference for your State registration. Plus, the amber can be wired as "on" parking lights as well as turn signals.
I had to replace my lights after the car sitting where the bezels started to rust & pit before I purchased the car. I went with the FFR because of the DOT approval.
Amber in front, set of amber and set of red in rear. Normally, the amber light is on top in the rear and the red below. However, I reversed mine to get the brake light up higher for visibility to those cars following me! The only accidents I have been in for the last 30 years entailed me stopped and someone not seeing me.