I though this may be of interest to someone. I emailed Audix to see about getting a replacement for the rubber mount part of my SMT-Micro mounts (they had shredded apart long ago). I was informed that the old style has recently been discontinued and replaced by a newer version. Same basic form factor but Cliff Castle at Audix informed me that these were designed to last longer.
Click the pic for more info: Looks like they didn't like me linking directly to their pic...here's the link.
http://www.audixusa.com/docs/products/SMT-MICRO.shtmlAlso, I just realized this about my old versions, if you screw off the top part it will fit a 3/8" stud. Not sure if the new version is the same.