Welcome aboard, Anders! I personally haven't seen anything like that. It's very likely it was a copy of a Sebring and fitted with Cimbria type doors that were modified. I'll do some searching; in the meantime you may want to join up here: Euro-Nova - Index page as that forum is the UK crowd and they will have far more information on the obscure copies of the cars. Cool find, though!
No worries, Anders. I've posted a thread on there to get the thinking caps going. The more I look at it, the more I see a modified Sebring. Can you post closer photos of the door area, both inside and out? Can you see any evidence of "newer" fiberglass that would indicate the canopy being glassed in, and doors cut out? The only reason I'm thinking this is the door jambs are aging differently than the inside of the car - they look darker, but that might be just a seal I can't see. If it is indeed a modified Sebring, whomever did that had some mad glassing skills!
Don't be sorry! It's a very unique ride. One of the responses by one of the more learned members of the Nova forum suggested that it might have been derived from a model Nova that had been available in Belgium that had doors instead of a canopy. If that's the case, it's entirely possible that a Sebring had been imported to do the same conversion. If you're able, post photos of how the door is attached - is it hung to be a gull wing or a conventional door? Here's the link to the current discussion going on at EuroNova: Euro-Nova - View topic - Mystery ride
You've got a buzz going on with trying to figure out where it came from! Search everywhere on the body for some sort of manufacturer mark - a hidden business card, a stamp, anything!
Yep, should be interesting to see what else you can find on the car physically to tell what's been added. I'll follow up with Dan at EuroNova to make sure that he gets your sign-up info. I wasn't aware that there is a lock on automated sign-ups.