Petrol cap help??

[neildawson1980]

My next problem on my 172 is the outer petrol cap the one the same colour as the car has broken, the plastic part that goes in and out as you open and close the cap.
Can these be bought or has anyone got any advice on how it could be fixed i cant glue it or any bonding as such as its broken right inside the car.
Cheers
Neil

 

[H182]

Probably easier to get one from cliospares or the likes and swap it.