I live in city of Varaždin,it's 70 km from Zagreb, usually it's called little wien

, for that homologation maybe you can ask directly in euroasia,there is lot of person in charge for homologation, i know some directors from financial departments and general managers, try to send them the email or simply go to them, maybe you have 2 hours from udine
i think that you shoud't worry about that, i doubt that police will bother you because of that, very often I also travel in many european countries with my car and don't have any problems with it, very soon hover will have homologation as M1, they have install the new engine and also most of new certificates are already verified from british VCA
p.s
PAG is very nice, I spend my holidays there for almost 6 years