Federal Signal Corporation 
Makers of safety, signaling and communications equipment, environmental vehicles, and machinery components. Information on product groups, investor relations and careers.
http://www.federalsignal.com/Spartan Motors, Inc.
Designs, manufactures and markets custom chassis which consist of frame assembly, engines, transmissions, electrical systems and running gears for fire trucks, motorhomes, school and transit buses and specialty vehicle chassis. (Nasdaq: SPAR).
http://www.spartanmotors.com/
PK Van Bodies
Manufacturer of van bodies for trucks and cutaway chassis - fire rescues, television production mobiles, police vehicles and other specialty vehicles.
http://www.pkvans.com/
Specialised Vehicle Manufacturers Queensland
Custom designed vehicles for many applications including ambulances, fire trucks, and mobile health clinics.
http://www.svmqld.com.au/
