Working with HD characters/morphs

I've been setting up some characters that I bridged in from DS, and I noticed that a lot of the morphs (vascularity and a number of @fenixphoenix's morphs) don't survive the trip over. It occurs to me that that's because, at base resolution, there is no visible change to the mesh. I've tried everything I could think of, and nothing has worked so far:

1. Exporting as FBX with "include subdivision data". This doesn't appear to do anything beyond what the bridge does
2. Bridging with baked subdivision. In the best scenarios, the mesh came in, but with the weights from the base resolution applied, i.e. a polka-dot pattern of weights with the rest unweighted
3. Importing a higher-resolution OBJ and copying the weights from either the bridged version or the FBX. I couldn't figure out how to do this at all, as simply copying the weight tag from the donor to the OBJ, with or without binding the OBJ to the donor skeleton, didn't seem to have any effect, and the weight manager doesn't appear to have a way to do this either
4. Using a shrink wrap modifier on the donor and/or base morph OBJ. This didn't seem to have any effect, even with a subdivision modifier or the sculpting modifier
5. Using the sculpting tools to project the mesh of the OBJ onto the donor. This resulted in an eldritch horror, possibly because it didn't work with the "source" set to the OBJ and the "target" set to the donor, so I tried reversing it. 

In case it's not clear, all this is a little outside of my wheelhouse as far as C4D goes, so hopefully there's a simple, obvious solution that I'm missing, but I'm just about at the end of my rope on this issue.