i don't think any of the FR divisions, except Dynamax, would do any customization.
some of the more expensive brands that aren't under a big corporation, like New Horizons, would probably do it for the right price.
but companies like FR do mass manufacturing with the idea of lowest cost to build.
for them, there's not enough money in customization.
Dan-Retired California Firefighter/EMT
and Zoe the Wonder Dog(R.I.P.)
2016 PrimeTime TracerAIR 255, pushing a 2014 Ford F150 SCREW XTR 4x4 3.5 Ecoboost w/Max Tow Package
4pt Equal-i-zer WDH and 1828lbs of payload capacity