Rollmaster CS5110 big block timing chain

I cannot find any parts store online or on Amazon that carry the timing set. Did they discontinue the single bolt Romac big block timing chain? I just bought a rollmaster for a buddy's Cleveland online so I know they're available.

Where can I order one?
The ProGear chain sets are better. I used a couple of the Rollmaster chain sets. The first was a good one, but the last the chain didn't last as long. ProGear last a looong time. Look at Hughes Engines for these.