SphereII and i discussed that but it cant be done for vanilla, it would need new code and DMT to work.
My question to you is, why bother? These new bandits are far more feature packed. They ragdoll, react to damage location, have gore, move smoothly, etc. Only advantage the old UMAs had was they could be easily skinned.
The only difference between these bandits (and survivors, traders etc) from the ones planned by TFP for after gold is they will add new AI tasks. However, using DMT we are adding new AI tasks ourselves.