Replace switch on Smart Twin Halogen Front Light

[Two mile commute]

My winter lights have started switching themselves off when I hit a bump. The push-button switch is the obvious culprit as when I wiggle the housing the lights go on and off and there's a wire exposed. I'm thinking of replacing the switch and am looking for a waterproof replacement. What do people recommend?(The lights are reviewed here if you want to see the type.)

 

[02GF74]

I had these but gave them to a friend who then had her bike stolen so cannot say what I suggest will work for you.

I had made my own LED lamps (far superior to the halogenb smart), hence giving away the Smarts, and use a small toggle swtich from Maplins that uses a rubber boot over the top, supposedly making it waterproof.

Having used my lamps over the last winter, both switches are still fine.