What I did when I ported over the summon monster info page was I PM'd the author and made it clear that I wouldn't take credit for it, and that I just wanted to keep it from being lost. He was fine with it (and also double-checked to confirm that I wouldn't claim authorship), so I did it.
I'd just do the same, and if they don't respond in 2-3 weeks, port it over and be sure to include a link to the original thread with credit to the original author. You're doing a service to the community by providing a second source for their material, so I doubt any of the original authors would have an issue with it.