I'm in a guild over in Korgath-US called iToons that does content at level. Unfortunately we're working on WoTLK now so you missed out on the BC stuff, but if you're interested let me know. I can send you a link to their forum.
You guys should stop your level at like 67 or 68 and do those raids. Or like 2-3 levels before what was intended for whatever. Bet that would make it more like the original challenge - can't imagine many of them are difficult anymore with new talents / scaling / etc.
I don't know if they still have minimum level restrictions on those instances, but I was able to circumvent Heart of Fear's level restriction on my 82 monk. All you need is a person of sufficient level that can zone in to zone in, then you can follow. I was carried through a normal HoF on that monk.
Obviously you can do whatever you want just making a suggestion to improve the challenge. :P