You should be able to do it yourself but you need Unity to create the asset bundle.
Save as fbx from blender, load it into Unity, fix all the missing textures (WHY!) and then export as assetbundle.
There are guides and when you get the hang of it you can do them in minutes from blender->unity->VaM.
I even manually make VAR files for mine now so I can put preview images in with them.
What is it you wanted converting? Can't promise anything but I am certainly willing to take a look at something you want converted.
(This is for non-person models. I don't really know how to do the skin textures or shape to morph conversions yet).