Are these by EyeShotFirst any good for you mate? (may need some tinkering… it has US spelling and the layout is a little different, though the black background should make it easier to edit etc?)
and the full size files can be found, viewed and downloaded from here:-
https://drive.google.com/drive/folders/0ByfjLkYDj7bROVVsSXFCQWxvS1k?usp=sharing
(it’ll be in the ‘EyeShotFirst 1992’ folder - there are a few others on there which may be of interest)
I’m not 100% sure but think I saw a vhs set of these got for something ridiculous like £5 on ebay uk not so long ago - may be worth keeping an eye out on there too for another cheap set - especially if the covers are in good condition.
Also, if any of the users in this thread are still around - http://originaltrilogy.com/topic/1992-VHS-release-of-the-OT/id/13108 - they may be able to help you with a good scan of the back covers?