Just checked on the Xpower forum and the chaps user name was Sheddist the article was back in 2010, but its worth a look as it has some pictures and is a clever design, he was going to sell them but suddenly stopped posting, the article is under Reparing inlet manifold KV6 article, try this link
repairing inlet manifold kv6
https://forums.xpowerforums.com/showthread.php?t=54886