Gotta drill 'em twice, just in case anyone tries to pass off fake single-drilled chips as the real thing! :
http://www.ebay.com/itm/1-00-HOLIDA...275403?hash=item2a669e474b:g:0ZcAAOSwr41XIbHO
http://www.ebay.com/itm/1-00-HOLIDA...275403?hash=item2a669e474b:g:0ZcAAOSwr41XIbHO