Help bring Opa home

My mom, Kerri, and her good friend, Tera recently visited Santorini, Greece and fell in love with a local stray. They named her Opa and we are determined to get her back to the USA to live out her days with us in Texas!! Unfortunately, my mom and Tera had to come home before making much progress on getting Opa to the vet and ready for travel, so we have now started the process abroad of getting her here. I have reached out to locals and rescue groups and we are already off to a great start!! However, getting a stray from across the world to the US is a difficult, strenuous task... and extremely expensive. So, any help is greatly, greatly appreciated as we embark on this adventure of bringing the sweet girl home!!! Thank you so much!