I use plastic "mic clips" (with no shock) most of the time with my AKG480s. Same with my Earthworks, and Naks. I've probably run that hundreds of times and I've never heard anything on a tape from someone kicking the stand, and I'm sure it's happened. Some mics are sensitive to that kind of vibration (my 414's are, and AT853's seem to be), but many are not. The main reason I use the mic clips was because (a) I have them, and (b) the AT8410's don't fit in my bag when it's full of other gear. A t-bar with clips on it is much smaller.
Before you spend a bunch of money on new shock mounts, maybe try cheap plastic clips.
One of the links previously mentioned as the Windtech mounts which have a rubber strap that looks like a car muffler hanger. Those work good, are pretty cheap, and you might find those in a typical music store downtown (the kind that sells trumpets and guitars to school kids). Take your mics to the store and see if they fit OK. I used them for a while, the only downside was the Naks I had at the time were a rather tight fit, but since 390's are smaller, it might be perfect.