If you wish to replace the switch......
First you need to know what kind, Mostlikely spdt or dpdt, possibly center off
(on-off-on type, not (on)-off-(On) type) (The on in prens means momentary)
Most Electronics suppliers will have this type of switch but be careful. I have seen switches rated at "20 amps" in places like Radio Shack where .. Well, 2 amps might be closer to what I'd trust 'em at.
On the other hand the ones I got at the kind of store Joe's TV shops at or Phil's Electronics or .. Well I have a friend who is an electronics Manufacturer and he likely shops there.
They can do 20 amps all day and not sweat.
(They also cost like 20 bucks a pop).
THey have an assortment of styles and so on as well. Mine are basic toggles.
WIth a basic toggle you can get a wall plate at Lowes, Home Depot, Joe's hardware (Any hardware) et-al which is designed for an antenna connector (But does not have the connector already installed) You may need to slightly enlarge the hole (or not) and you can use it.