There sure is. Offenhauser probably had not sold as many crossram manifolds in the first 30 years as they have in the last 2. Lots of people want the crossram look on their car. Theres actually another of the clone setups with the winters casting added to the offenhauser cover on ebay right now. Offenhauser is probably wondering what's going on.
CrossRam Clone on Ebay
Then theres this place:
T/A Performance Restorations