I think the HR Xvids (around 700mb each?) do have AC-3 5.1 audio - so they'll do fine. I only asked about the 720 and 1080 versions as well because, well frankly I'd love to see Heroes in that high a resolution!
But yes, the HR Xvids should do. Email me at klokwerk[at]gmail[dot]com and we can work something out. Send your trade list along if you don't mind.
I don't know if you've seen 1x17 yet, but I just watched it and it was good. Changes a few things.