Mopar R3 blocks went "NS1" last June.... no longer in production. Last time I ran a bunch of numbers there was like 1 9.0 deck block still in warehouse...... but that was like 8 mos ago. I had "heard" Indy bought up some of the 9.56 blocks, but can't confirm the rumor..... if they did, you can bet they're keeping them for builds with their heads, or will want a premium price for them. BTW my 9.20 deck R3 was purchased at the dealer (where I work) for $2100 which was around where some other guys I knew that had purchased them.
there are still some complete R5/P7 mills floating around out there. Pretty much the "last call" for high end small Mopar stuff.