Old video's from the 80's. Are they still available?

Hi,

during the 80’s – 90’s a company, which I think was called DiD, produced low budget but otherwise very interesting warbird themed videos.
Blenheim Restoration, Making of Memphis Belle, Warbirds of Great Britain airshow etc.
These videos were often a collection of stills, cine cam-corder movies and professional video intermingled.
I was wondering if any of the movies have been re-released on DVD or if anyone has been able to convert any.
I’ve seen one about the BBMF was released in the Works under another lable.

Thanks,

H.