Hi GearboxOz
No worries, perfectly legitimate question no matter which part of the world you reside in.
The dealers do not want to maintain anything over 10 years for Piaggio but fi you ask nicely and provide the parts they may help you out.
Parts can be found on EasyParts.com. But you must check the VIN and model for your Mp3 to make sure you are getting the correct parts. While many parts are common across all models, some are surprisingly model unique.
Check this page and see if it has what you are looking for. This is the diagram and parts for the 2010 NAFTA Mp3 250 series but your model may be different.
https://www.easyparts.com/explodedview/Genuine-parts-Piaggio-MP3-250-IE-RL-MIC-E3-2010-(NAFTA)-Switches-m22899-d167783