http://www.goldmine-elec-products.com/prodinfo.asp?number=G22287 (http://www.goldmine-elec-products.com/prodinfo.asp?number=G22287)
I noticed these on Electronic Goldmine and thought that they'd be pretty cool for a vibe. Probably wouldn't work any better but they would give you your fill of mojo for awhile.
Time to make a giant Univibe.
Dang, those would be great for some demonstrations of practical electronics in my physics class room. Sadly, no shipping to the Netherlands.