You might try the HeliGuard bags, from Ideal4All Hobbies.
They have a variety of sizes off the shelf, and will custom make bags as well (they just made one for my Velos, to my measurements and it is a perfect fit!).http://www.ideal4allhobbies.com/category-s/37.htm
I have about 20 of these now. I store machines in them and they stay clean. I transport machines in them and they don't get beat up while going to and from meets.
Team KBDD/Compass Team Manger/Prostar Hobby/Team JR Americas/Gens Ace/WR Field Rep