Check this out:
http://www.nitrodynesystems.com/

Thing is though, I don't know if he's making any more of them...I think it was lack of demand...you could ask him though. He's in the car engines forum...
Can't remember his RCU handle right off hand, but when it comes to me, I'll edit this post and put it here.
Edit: O.K. the guy who mods and dyno tests car engines is Colt4g63 (and I think he's the one who either made or sold the dynos as well? )

Those engines you have listed have already been dyno tested...rccaraction used one of his dynos to test all of the engines that they have reviewed in the mag. There's a thread in RCU's car engines forum...I just gotta remember what the title was?!
Have a look around a few pages back in there and just poke around...