Hi @attran99,
Not sure if it’ll fit your criteria (but ask them), but you might consider Tacos La Carreta (our favorite Carne Asada Tacos around here). 
They use mesquite charcoal, their Carne Asada is so good! I posted some thoughts and pics in the Taco thread.
They do catering, but not sure how much they charge.
Tacos La Carreta
(562) 500-5581
(562) 377-2819
Good luck!