Try lega pro animale, an italian cat charity, the were able to offer help/advice to me when I had a stray kitten I needed to get back to uk. I have no idea re rules for entry from countries outside the EU, I brought my pets over to italy on pet passport and could bring them staight into italy without problems, if you were going to the uk you have to wait 6 months following the blood test. If your authorities are not satisfied with entry for your cat they may refuse entry or insist the cat goes into quarantine, anyway, that charity should be able to help.