Got mine today on ebay £104+p&p@ £10. These were new and genuine.
Yupie doo. . . .yer tryin er upset old git r yer. . . .
Yep tedshred made er good point , had a similar problem in the past, un used to use a lacquer from rs , fink it was called modified silicone, however it was a clear spray and once apply it would leave a water proof membrane, you could spray after tightening bolts,think it used to be used for printed circuit boards, jist er thought. . . .Make sure you tightend the bolts good and proper or the water will leak down through the roof lining and you will need to by a new map light
(bitter and costly experience)