I bought a pair of slipstreamz. Tiny company, I guess, since it was mailed directly from South Africa. I got distracted and never finished installing them. It was pretty darned complicated. I've lost them somewhere in the house. And I don't see how they could work very well, since they're so small. I really think an ear fairing needs to be much wider.
Cutting out wind noise by reducing all the hearing seems to be the wrong approach entirely. I just want to cut the wind noise, without reducing anything else. And I'm sure it's possible.