I thought about this while walking around Walmart last night, it's a real cheap way to make an egg candler with a few bits and pieces.
$1.00 flashlight from the camping section
$1.97/2 pack 1 1/8" rubber chair tips
Cut a hole in the middle of the rubber chair tip.
You shouldn't need anything to attach the rubber tip to the flashlight, the ones I used fit very snug.