You can get such a kit from goodvibes.com also; it comes in peach or brown. It's not cheap ($115), but it comes with enough material to make 2 of them, so that if the first one doesn't come out the best, you'll have another chance to try again. Also, this one doesn't vibrate either.

http://goodvibes.com/cgi-bin/sgin01...&TRAN85=N&GENP=

I wonder if when you pour the silicone in the mold, you can but a bullet in the base of it before it hardens.

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