I did the same search about 1 year ago...
I know I don't help in the "fair" way, but I found nothing here, as said: "splashproof". I ended by ordering some "splashproof" cigarettte-lighter sockets in Europe...
If by chance you find this sort of socket in BKK or LOS, please, be kind to tell us were...
Thanks in advance and good luck,
I know that it is of little help right now but I have fitted these to both my bikes here in New Zealand, the sockets being easily and cheaply available. The Transalp one sits in the fairing to the left and the baja sits on a bracket in the centre of the bars.
Both are waterproof with the rubber seals over the 'socket hole' for when not in use. As there is no fairing on the Baja some additional cover may ve required for the two connectors but I have not bothered. They are rubber covered anyway.
I will be back in June and if requred am more than happy to purchase here if you have not solved the problem by then.
Go to www.whitehorsegear.com I have Brought Heaps of Stuff from them and it has been delivered to My door here in Chiang Mai within 2 weeks normally. If You click on Electrics in the left hand Column it will take You to the Powerlets. I have brought quite a number of these items!!! Brilliant stuff!!! :wink: Good Luck.