I contacted Northland shooter supply for Criterion's and am waiting to hear back about their inventory.
I am also considering the 30" beast. I guess as a bench shooter it really doesn't matter but with a 7-8lb barrel it would knock out the recoil (I know the 308 isn't a heavy recoil round). The size just seems so unpractical and for under 500 yards you really wouldn't notice the extra 100fps or so.
I guess the worse case if it became to much I could still just chop and have it threaded.