Ask yourself a question.
Do you think that writing to your solicitor to issue a writ against a defunct aviation company, because you chose to restore and fly an aeroplane that was inherently dangerous, is going to win you any credibility points, anywhere in the world with anyone?
Please pass me a glass of whatever it is you are drinking.
(imagine scenario: man calls insurance company - "hello, I have just restored a ShyTalk, y'know the ones the wings fall off of, and I was flying it and the wing fell off - can't imagine how - so will you pay out on insurance . . . ")
If you are going to fly it, make sure it is safe. If it isn't, don't fly it. If you do and you crash and die please don't call me and complain as I will be busy doing something else.