I think the only block currently available would be the MP/World P5153944 Block, Cast Iron, 440 Wedge, Siamese-Bore, Rough Bored at 4.31". I don't know if these would be legal for Stock/SS since they may have the cross-bolted mains. I don't know if there are any of the older Max Wedge replacement blocks still around. Several of those were on Ebag about six years ago and some of them were machined incorrectly. One I saw had the Hemi drain back holes drilled in the block. I tried to get one during a clearance sale back in 2001 ($400), but they were all gone PDQ.