Well, since the Favorit never was sold in Sweden as new, then the only real choice I have if I want a Favorit is to import one. I have done some searching and found out that it's actually quite cheap (i guess) to import a car. You have to pay VAT (value-added taxes), which is 25% of the cars value in Sweden. If the car is newer than 6 months or has driven less than 6000 km, you have to pay VAT in both Sweden and the chosen country I bought the vehicle from. And since nothing other than a museum piece has less than 6000 km on the clock, I think it's unnecessary to look up the VAT in various different countries.
Then there is some other things to pay. I don't want to translate the whole text step by step, since there is alot, but I can link to the site I gathered information from: http://teknikensvarld.se/importerabil/ (in Swedish, I can translate if needed). For short, it will cost approximately 3200 SEK, or 2300 DKK, 300 EUR or 270 GBP, excluding VAT, road taxes and the traveling part. And yes, a new MOT is needed, and included in this cost.
It looks more and more tempting. However, is it hard to find parts? I've seen that they have gotten super rare. Is that because of a decreasing amount of spare parts? Would it be hard to keep a Favorit running in a country where they were never sold as new?
(And is it hard to import cars from countries that aren't that popular to import a car from? Like from Poland, Czech, or maybe even the Netherlands, Austria, etc. (I haven't come across cars that are imported from those countries, although, the family's Mazda is imported from Luxembourg, but not by us). I have searhed but not found anything useful).