Hello David:
I have been on my favourite Estonian site for almost an hour and came up with one sole Morris of 1937, a civvie one.
Go to
http://eag.unicweb.ee/english.html
for hundreds of photos of both civilian and military cars, trucks and busses resident in Estonia from the beginning to the 1950s.
I only found the English translation button just a moment ago and do not know if it works for the whole thing. It is in three/four sections and can give you a real headache if you try to figure out the Estonian language.
Anyway, here is the photo.
Cheers
Bill