A couple of ideas for you:-
WAIT & HOPE your reader you ordered works
ANOTHER OPTION Grab yourself as many different LF cards as you can ( ebay / amazon ) and try to enroll them into your system, the one(s) that work will be your answer.
You will mainly be looking for the common ones: EM41xx, EM4200, HID 1326 ProxCard II, HID 1346 ProxCard III, and Indala.
Where are you located?
You may be able to send a spare fob to one of our community members nearby with a proxmark.
That would probably be your FASTEST and CHEAPEST option.
The BEST option, especially If your work will pay for it.
Send an enrolled fob to Amal ( with your access profile on it ), he can scan and enroll it onto a NExT ( or xEM or FlexEM etc ) and send it back.
This will give you the implant you
want NEED ready to install, PLUS you will get the answer as to what LF cards you need for the rest of the staff.
THE PROBLEM IS:
This service is no longer available on the website, so you may have to ask Amal super nicely
DT are also on holiday until 1st Jan, so If you can hold out sending an @ Amal on here, or using the Orange help on the webpage until after then, that would be nice ( They are having a well deserved break, over the past year, Amal has been on the forum 354 of the 365 days, that’s not including the other platforms he monitors and work he may be dong outside of communicating with the community )
This is what you are looking for on the webpage
THEN, convince others at your work to get some implants