You need two things:
Protec classic skate helmet. Soft foam, used by aerialists, and honestly the best thing I have come across (8 concussions of one sort or another). Plus, you can get one for only $30 at http://www.albes.com/index.asp?PageAction=VIEWPROD&ProdID=308
. I bought mine a size big so I can wear a hat underneath (warmer.
Then buy some giro tuneups for the 9.9 or g10, and sew them into the helmet straps.