The part class has getMesh/setMesh, getRenderType/setRenderType functions it may be achievable with those but I recall these returning typeIDs with an rpk index of 0xff meaning they are runtime generated but who knows, maybe you can make a part with the wanted visuals and then just use the typeIDs returned by that.
If there is no standard way to do this than I'm afraid it can not be done yet, this would need full understanding of the virtual draw calls and then further more adding some parameters to the hierarchy (so reshade would know which draw calls correspond to the desired meshes and so on), far too advanced compared to the simple hacks I've been doing.
