they will be back

but they wont be casted in rubber resin due to money and resin(stuff is too sensitive to moisture) issues they do sell a drill piece or use a dremel to open them up.
http://i30.photobucket.com/albums/c330/Lownslow302/168a9ced.jpg

The quality of them is first-rate! :sunglasse I'll have a set on an upcoming project. :sunglasse