NBS stepside shave?

What do I use to shave the tails on my stepside since it's a fiberglass bed? Is there a company that makes filler plates for the nbs stepsides? Thanks in advance fellas....

Bump....Anyone

i would just make a mold of your stock taillights

Its not fiberglass it is smc plastic i believe. U can grind the back side and fiberglass it on the back then use smc filler over the glass to finish it out.....

Thanks fellas!