e-bay link to a un-bumpable euro lock !!
http://cgi.ebay.co.uk/Euro-Cylinder-UPVC-Door-Lock-100-Bump-Proof-Guaranteed_W0QQitemZ180323387906QQcmdZViewItemQQptZUK_HaG_Lock_Safes_GL?hash=item180323387906&_trksid=p3286.c0.m14&_trkparms=72%3A1121%7C66%3A2%7C65%3A12%7C39%3A1%7C240%3A1318
This guy is claiming these peterson locks are un-bumpable, take at look
This guy is claiming these peterson locks are un-bumpable, take at look