Chopper,
You can pick up inert pinapple grenades all day long at army-navy surplus stores for 6 to 8 bucks....I've got about 10 of 'em lying around (I use them in my WW2 reenacting hobby)...and, they already have a hole in the bottom!:)
Ebay is full of shrunken heads for sale, from 3 bucks to...
Yeah...I like those lights! I've mounted blue-dots in my stock ones, but I want something "different", like you....be sure to post some pics when you get 'em mounted....:)
Rob