Thule (Konig) K-Summit (K-34)
http://www.konig.it/SchedaProd.aspx?ID=920
They'll fit 265/35-19.
Can be purchased from here:
http://www.vulcantire.com/cgi-bin/ch...eKSummit_l.htm
But as you're in Greece you'd probably be better off hunting around for them in your own neighbourhood.
These things are bad-arse. Just a shame Seattles weather cleared before I could give them a work out on my FWD torque steering Viggen jalopy.