 Box 357, Fontana, California.Later on they used a street address of 44500 Sierra Highway, Lancaster, California and later still 10156 Rush, South El Monte, California before moving operations to their most well-known location at 9800 E. Rush Street, El Monte, California.After gaining experience making complete fiberglass bodies with the Devin-Panhards, Devin Enterprises expanded into production of fiberglass bodies to be sold to builders of custom and one-off specialty cars.