Well, fortunately for you, I have every single book in e-book form on my computer.
However, unfortunately for you, after doing a keyword search for "Dracon", with hopes of finding the Yeerk's name, there was no reference to that name in ANY of the 60+ books. There was no mention what-so-ever of the Yeerk that modified the shredder. Sorry.
Here's a bit of trivia, in books 6, 12, 22, 27, 32, and 40, there isn't a single refence to a Dracon. No Dracons were fired, or even threatened.