Keep in mind, any rips from the HBO specials are probably from the ac3 track which would make encoding them (at least) twice really a bad idea. I did just share lossless rips of Dec 6 & 7 from the Dolby E files in the broadcasts...So look around and you should find them.
Aleesoft Free Blu-Ray ripper. I managed to rip the embedded soundtrack for Assassins Creed II: Bloodline for the PS3 Blu-Ray bonus disc.