There was a guy named Rick who had put it into motion. Now how far he got, I don't know. See updates at http://www.projectthx138.com
I've got the Offenhauser on my SBC for that reason. Much cheaper ($300-$400) and easier to find. Still holds 4 2bbl Rochesters, etc. But if someone produced a quality reproduction, I'd change it out in a heartbeat. Last time I saw a Man-A-Fre on Ebay, they were bringing $2,000-$3,000 ... OUCH!