The best shockmounts for SDCs are, without doubt, the Rycote InVision series - just £30 each in the UK. There use the patented "Lyre" mount that is extremely effective and is rugged and unbreakable.
The only others that come close are the Cinela Osix at a higher price and the Shure donut mount.
Personally, I have now moved over to the Rycote series of mounts for all my microphones.
THIS pdf makes good reading - "Keeping Microphones Quiet".