Is that for IDA's or IDF's? I've only seen the latter in a 2V. From what I've seen on the used IDA manifolds on Ebay they fetch almost as much as new ones and they are still listed in the Hall catalog. Kelly Coffield (Panterror) casts his own Weber/EFI manaifolds and I bet he could supply one with 2V porting.
There was a guy that George new in Australia that was going to cast up some IDF manifolds...hmm..maybe I'll have to resurect that thread.