Hello John, To start with I was referring to the jeep.
Ive got the key card history for the Morris, which Im assuming is the card you are on about.Key Card no. 2 from the RLC museum, with date of disposal. On the column " converted from" I assumed, mistakenly perhaps that this was the Z number.
But you are right, it would be nice to find out where those records went, my guessing is they were probably destroyed.