From the FosterCoachSales Facebook page:

Brand new custom Horton conversion on a Ford F550 chassis for LaGrange Park.

Horton Type I ambulance F550 chassis on a Ford

Foster Coach Sales photo

Horton Type I ambulance F550 chassis on a Ford

Foster Coach Sales photo

Horton Type I ambulance F550 chassis on a Ford

Foster Coach Sales photo

new ambulance interior with Stryker cot mechanism

Foster Coach Sales photo

chevron striping on the back of an ambulance

Foster Coach Sales photo