Hey, thanks all for the suggestions, I picked up a pair of bulbs and the RTV today, disassembled the whole thing only to discover I was wrong, it isn't the gasket which caused the leak but rather there is a crack on the inside of the housing, I used the RTV to fill the crack for now but will try to see if there are some aftermarket replacement tail lights or something as I don't know if this repair will last.
Thanks again.
