I've been taking a small p/a to my weekly trio gig and setting up the amp on a chair next to me. That works, but in other venues might be a problem. I've also used a music stand, but would really like something I could clamp to my mic stand. Searching the usual places has been unhelpful, as everything is either too small or too big (and too expensive). I know I'm missing something. Anybody got a suggestion for a readily available try like I described at least 12"x12"?