H4-X Swash Helicopter recommendation

Hi there,
I am currently working developing code for big guy which has H4-X swash plate. I want to test my code on a more affordable platform. I made some researches and couldn’t find remarkable results. At that point I need your help guys. As you all know that most of the RC helicopters are using 3 servos today. Could you recommend me a helicopter which has H4-X swashplate?

You can find systems in kit form here.


and many more, you can browse this site.