>> You might be best getting replacements made
for both sides, so that
they look the same - I expect it might be tricky to get just
one done
and not have it look a little odd.
That is what we're thinking, too. Remove the one good side, put it away
somewhere safe, and get two new sides made. Instead of exact replicas,
they only need to evoke the originals -- so for example we'll get the same
dimensions, similar share of blue for the top and bottom, but with a
lighter shade for the dark side panels so that museum visitors can see
through without us having to open it. Not totally clear, but just lighter
than the originals.