Confirmed with a Finnish MOT office that the car will not need a CoC document at import, as it's old enough to not need one. The two Pandas have slightly different VIN plates, as MXM's 1999 car has the EU type approval stamped on it, and mine only has the German ABE equivalent. Weirdly, the MOT office where I took my same-year MX-5 at import initially said I should've needed the CoC, and later marked down the EU type approval codes in the Mazda's German documents that luckily had them. But since I have confirmation from another place on this occasion, it should sail through registration with minimal expenses instead of needing costly documents. And since it has fuel injection, a catalytic converter and headlight adjustment along with fresh Slovenian MOT, I can't foresee that many problems.