Hi, Thanks for you purchase.
"The copy and past blend shapes never worked between models. I was able to apply blend shapes to the exact model with the copy and past function but not to a similar sized model with identical vertex order. (but overall different shape)"
Hmm, that should work I have been doing that with the new example model I am working on. I am getting the best results exporting blend-shapes as single shaped meshes and using the Blend-shapes/Load Command; as the blend-shape normals and tangents look better when unity calculates them as a single mesh.
Can you send me a unity package to test out? I should be able to sort out the problem quickly with out much back and forth I will not share your assets and delete them once I have found a solution.