I was wondering if you fellows might have some ideas on where I could buy quality self-adhesive rubber cushions to put on my speaker stands. I want these cushions because it will keep the speakers from sliding around on the speaker stand tops so easily. Plus it would likely provide some additional vibration isolation from the metal top plate of the stands. I need rubber cushions that will provide some cushioning affect, but most of all a surface that will grip the bottom of the speakers so as to not let them move easily, even if they get bumped. The problem is I haven't been able to find such non-slip rubber cushions anywhere. Any ideas on what types of cushions to get and where I could order them from would be appreciated.