If you have some time to kill just pull your motor mounts, front and rear(we do the drivers side one as well) and fill them with two part eurathane. We just did ours, have done a few over the years, this is the product we use.
Devcon Flexane 80, 1lb kit, will do two cars if just doing the fronts and backs. Cost is around $30, if anybody is going to do this I will post a simple how to. Far superior to any other "damper" and only adds a few oz to the weight of the car, no fitment issues with STB's.
BUT, you need to have your car down a couple of days or so. Pull the mounts(rear one is a bit tricky) which you can do without any kind of brace, hoist, etc, fill and let sit overnight then bake at 150 degrees for 24 hours to fully cure it.
We will know soon if to stiff with this particular durometer(stiffness) and will post mods if needed to make them a tad bit softer.
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Or wait for the ZPI inserts, still better than a damper, for true performance at least.
Rick