Anyone tried military grade anti vibration feet ?


I came across this listing on ebay where the item is a vibration isolation feet used for military purpose to isolate electronics in military vehicles. Here is a link:
http://www.ebay.com/itm/ws/eBayISAPI.dll?ViewItem&item=110988576178

Has anyone tried something like this ? As with many other products like Vibraplane, industrial products which are scientifically designed do go well with many of our audio applications. Looking for some experience here.
pani
Generally, you get what you pay for. Save money for Stillpoints Ultra SS or Ultra 5s.
I like the idea of the Machina Dynamica Promethean springs, but at $13 a piece, it's a robbery. Surely those can be had for a fraction of the price with some research effort.