This might help:
http://www.forum.earlybay.com/viewtopic.php?f=4&t=6920" onclick="window.open(this.href);return false;
I've got a set of buttys adaptors (23 or 25mm will measure) with Porsche locking bolts available, used them with my cookie cutters before I changed my brakes/hubs for Porsche pcd.