Mister Meiser has his blanks made by many manufactureers depending on needs. Graphite USA, CTS, and others. No matter who makes the blank they are all world class, I've never found anyone that doesn't love their blank/rods from Bob.
Rainshadow has a new line of switch blanks.
Another blank that make a fine switch rod is the 10 ft Dan Craft FTs. I have one I built on a seven weight and it is a phenomenal rod.
Forgot to mention that what a blank's graphite is is of little consequence if the person using it doesn't know what they are doing.