dario,
all the doors on the bc9x00 series should be identical, just the differences in the finish.
from memory, so forgive me... but, you should have a few options for exchanging these. i will be happy to take a closer look this evening.
i believe that the door assembly (meaning both doors, tracks, mechanism, etc...) can be extracted complete. this would likely be the best bet as you would not be disturbing the stringing and you would avoid one of the greatest (dis)pleasures in these wonderful machines... restringing those doors!