Given they do not offer screen captures or previews of these videos I've been able to find some of the out of business producers using a site called the way back machine at
http://wayback.comThis site was real helpful finding videos for out of business producers such as Bellstone, Flamingo, etc and others where I can see some screen captures of their videos from before they went out of business. The only problem is you would h ave to know their old domain name. For example, before going down earlier this year, Video Sports LTD used videosportsltd.com and although they had not put out any new material in like a decade, if you put that domain into the way back machine site you can see their old site from as far back as the early 2000's.
Thought everyone might find this helpful.