I'm am looking for a link or name of a manufacturer that manufactures a mic holder/stand that can slide between the bottom of an amp and the amp's road case in which it sits. I would be using either SM57 or MD 409 mics with them. I've seen some of these used previously and they are great. If the amp moves the mic stays put and moves with it. I don't even know if this device has a trade name or not. Any help would be appreciated.