The Sireno light bar, beacons, siren, and speaker were ordered right out of the Kelco catalog!
The Kelco Supply Co. is the funeral home supply division of the old L.H. Kellogg Chemical Co. (embalming fluid). They're still in business today:
http://www.kelcosupply.com/
What this thread covers will be what Kelco no longer sells...ambulance equipment! If you were in or around the funeral business through the late 1980s, you've probably seen the small (but thick and heavy) green catalogs. Today, these old gems tell us what we would have seen in our combinations and ambulances 30, 40, and even 50 years ago. With the exception of a two-way radio, a funeral director could completely equip his emergency vehicles from this catalog (including first aid kits and disposables).
Here are some pages from the 1975 catalog; some of the items and descriptions, however, date back closer to 1960. I'll identify as many of the stretchers as I can; hopefully, this will aid some of you in finding period-correct ambulance items for your car(s). Here are some examples:
Page 768
Top - ?
Next - #54-L
Next - #32
Bottom - #21, #21-L
Page 770
#28
Page 771
Mortuary cots (if it doesn't have side rails, it's not an ambulance cot)
Page 772
Top - #26
Page 773
Top - #30
Bottom - #27
Page 774
#32
Page 775
Top three - #30-TC (T = Trendelenburg, C = contour)
Next to last - #21-T
Bottom - #54