Rear tail light panel

That is good. I do not have that service available. Did you notice mine was 1/4 thick material? I have to buy that in 20 or 24 foot sections. Have cut the holes with a hole saw but #### that. Use a store bought thin bracket for a 4 inch pop in and mark the hole. Use a torch and cut right on the line. Use a carbide bit working it out until you can get the light in it. The hole has to be bigger for thicker metal.
4 inch LEDs I like are about $20 ea. Grommets are about $2.50 ea. Three wire pigtails are about $3.50 ea.
Junction box is about $15. Heat shrink connectors are about $1 ea.
Now did you not mention brackets for mudflaps? Mine also had to have side markers on the end.
Prices are different around the county. We are a little bit talking apples and oranges but only meant to share what this might cost.
Be happy and keep smiling.