Did you think that maybe you might want to go somewhere there is no lengthy quarantine, and then just get a train up to sweden. I am not sure of the laws in lets say Russia. It may take you a few days to get you there but at least you have your cat.
Or you could look for some one to come by every day or so to feed and water the cat. They do have auto-matic waterers and feeders as well, even cat box robots.