I've seen an Assos one at a bike shop in downtown PDX.
http://www.competitivecyclist.com/pr...:referralID=NA

Personally I sweat enough that I find these to be pointless. I like the standard cycling caps with an REI Buff folded in on itself a few times to keep my ears warm. I only switch to my other full cap when its in the 30s and raining.
This is basically what I use when it gets really cold and nasty out. Mine is an REI version using e-Vent fabric that as far as I can tell they don't make anymore.
http://www.competitivecyclist.com/pr...718.373.0.html