how do i get my car registered locally?

X bought a car from a foregn country financed by the bank. unfortunately X died whilst he was in the process of registering the car locally. secondly,the loan was never secured under credit life insurance to enable the bank to claim payment of the loan balance of the loan from the insurer. the merx was thereafter sold to myself through the bank. however i am unable to register it owing to the fact that the family of the late X cannot locate the original registration documents of the said vehicle.