I was searching on eBay and found (on ebay.uk) a light bulb for the backup lights that contains an actual backup alarm. As the C-Max is silent in this mode (reversing out a parking space or garage), I'd like to have that alarm. However, the bulb seems to be a "press 'n turn" variety rather than the W16W (push fit) LED type. Has anyone managed to locate the proper bulb with a combo-alarm attached? It would certainly make for a simple install.