From the Foster Coach Sales Facebook page:

Brand new custom Horton conversion on a Ford F550 chassis 

Horton Type I ambulance on Ford F550 chassis

New ambulance for the Addison Fire District. Foster Coach Sales, photo

Horton Type I ambulance on Ford F550 chassis

New ambulance for the Addison Fire District. Foster Coach Sales, photo

Horton Type I ambulance on Ford F550 chassis

New ambulance for the Addison Fire District. Foster Coach Sales, photo

new ambulance interior

New ambulance for the Addison Fire District. Foster Coach Sales, photo

chevron striping om back of ambulance

New ambulance for the Addison Fire District. Foster Coach Sales, photo

thanks Ron