I don't know if it these doors--- but here is one source I found by googling "build a teardrop + doors + suppliers" (or close to that)
Rexco RV Door Mfg Co.
No web site. Located at 1912 Agusta CT., Ontario, CA. 91761 (909) 930-1520. Manufacturers of RV door and frame assemblies and will build to your dimensions with slider screen window, flush locking door knob, and choice of aluminum siding.
Here is the url where I found that.
guessing he may be an Aussie.
another possible source: