I set the hook on a 13" smallmouth and the top 8 inches of my KVD crankbait rod snapped right off....First time using the rod and about only the 4th cast...I gotta send this back to Quantum but where can i find those tubes they get shipped in?

Ship it in a 2 1/2" PVC pipe.  You might call Quantum and see if they actually require all or part of the rod to be returned for warranty replacement.  Some companies don't, some others require only a part of the rod, like 12" from the butt, to be returned.

I am assuming it is a baitcasting rod. If so, you can get away with 2" PVC pipe. I agree that you should call and see what is required. Could save you some coin on shipping if they only require a small section. BTW, PVC pipe is only about $3.50 for a 10' section.