Marc Summers would be ideal. He would have had the most experience, and I believe he was there when the studios opened.
http://www.imdb.com/name/nm0003162/ and it looks like he is trying to revive Double Dare
http://www.aroundphilly.com/blog/2012/05/10/marc-summers-to-revive-double-dare/ So he might see this as a good promotional opportunity, to help create the nostalgia around the original program. If you subscribe to IMDB Pro, you can get his representative's contact information so that you can reach out directly and inquire if this is something he would be interested in doing.
I do PR/Marketing/SEO for a living, and I have used celebrities before, it honestly isn't really hard to get people interested. You just have to pitch it right the first time.