I forgot...I should have referred you to the "button" for FCC Database on this site.
I tried the link and found you some good info.
Of course, the standard: H.E.A.R. 155.340
Care Ambulance - 155.355
Haynes Ambulance
155.205 155.235 155.295
462.450 (467.450) 453.0125 (458.0125) 463.0375 (468.0375)
463.1625 (468.1625)
Hope these get you started.
Good luck!
Julian