Signage for Family History Centre

Does anyone know what signs we should have for the family history centre?

We are a centre inside a stake building.

We have a door with a bell on one side of the building.

We want a sign on the building.

Signage Post approved signage. For a list of approved signs, contact a member of the high council over physical facilities who can contact the facilities manager.

We approached and were told we can't have any sign at all. That no signs are approved.

I found these signs online and they look pretty official - like the signs inside the building.

Advice needed.