Check out the forum at Hoodswoods. In the 2nd section, go to the DIY Projects, about page 3, you will find a forum about teardrop trailers that one of the Hoods has built.

It includes many graphic photos of various stages of the exterior shell.

The construction appears to be much easier and common sense than I ever suspected it could be.
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QMC, USCG (Ret)
The best luck is what you make yourself!