Behodar: As far as I'm aware, the UK Bond 50 set (which I own) has the "best" available versions. I read that the headbutts are gone from all releases worldwide, although I'll stand corrected if that's not the case.
I managed to nab the US zone A Bond50 from Amazon.com in late November for the absolutely ridiculous price of NZD$130 delivered...

Will keep an eye & ear on things when I get a chance to watch them... haven't watched a single one yet!