Any proximity access experts here?

[Rockatansky]

We have an entry barrier at work which can be opened with a proximity fob (pac branded).

The control unit inside seems to be branded bel-key (pic below) and looks to have the function to program new fobs. In order to do this it seems that an editor key/token/fob is needed. Nobody knows where that might be, do any of you folks know if such a key can just be supplied off the shelf?

I know fobs can be copied by the likes of Timpsons, but having an editor key might be a better solution.

Thanks.