Can someone recommend any pro code 3 model builders who build/modify vintage diecasts upon request? 

I am looking to have a model made of the US Army M55 long wheel base cargo truck that would based on the Dinky 665 Honest John chassis. 

My model making skills, especially highly modifying a diecast toy chassis and donor parts are woefully out of date and, I would like to have something made where the finished product looks like it was factory built. 

Thank you for any information you can share. 

Mark Simiele