I have been fortunate enough to have been gifted a set of OEM Honda roof bars (Part Number 08L02SJD600) by a friend who used to have an FR-V that was written off in an accident. (version without roof rails). Only trouble is he has lost the key to the plastic lock covers that stop the bars being nicked - I can still fit the bars and use them, but they and my roof box are vulnerable to being nicked as anyone with the right size allen key could undo them. I'm having real difficulty finding a replacement key, coded 'N31'. It seems Thule do an N031, but this is not the same lock - the Honda one in slimmer diamater and shorter than Thule ones, they are not Thule locks. Does anybody happen to know who makes the cylinder locks for this part? Usual online searches have proven fruitless. Long shot, I appreciate!