I think you can use the align 305mm blades for that.

See this link. http://www.fxaeromodels.com/product_...oducts_id=2204

I did a quick search and found that, I'm not reccomending you buy from them (not saying don't either, I have never heard of the company).

I've had my tracking be out to the point where it makes the heli tough to control and sounds bad, can't fly that way for any length of time without causing problems.