Those aircraft were intended to survive few months of operational service at best. Nobody worried if glues like Kaorit would survive to the next century. Low quality of wartime production also reduced longevity. So I would say it is good enough the aircraft survived so long, and not disintegrated many years ago. It would be good, if they cobble it together in displayable condition. And it is certainly not possible to fly it without replacing all the structure which will result with a copy, and such a copy could be built right now. I wonder if there would be anybody willing to fly it, though.