A fat fingered postman recently damaged my letterbox, the left-hand pin on the top of the 'flap' has cracked through the plastic surround/hinge. I assume I can just buy a new letterbox and slot that in, but was wondering if they are all a standard size? (its a PVC door btw). I am planning to kick the postman in the *******s when I next see him, but any advice in the meantime would be great. Cheers lads (and lad'esses)