Try Joe Salas, owner of NTG Racing. He is close to Aluminess - as in, just around the corner, the last time I was down there. +1 (619) 449-2758
Joe builds support and pit trucks for Baja-type races, among other trucks, vans, and similar rigs. He did some very legit suspension work and fabrication on my E350 6.0; one of the first FOX shock installs on an E350 according to FOX. He's very knowledgeable.
2010 Ford EB E350 4x4 6.0L with SMB Penthouse