Most aerokits plans legal
The wood window frames did not have the centre piece on my model either. I used thick acrylic that goes flush to the outer frame and the outer metal frame is then attached to the acrylic. This has given a very neat finish and I can't see any of the wood through the windows.
Looking at some of your pics I see the white hull was painted over a blue base - mine was also so it must have been a popular colour in the 60's.
Dave
Live long and prosper
Dave