If you want to make it look like the hair is shaped that way, then get craft foam and cover it in wig fiber. It's flexible and is used to put wigs in crazy shapes. I'm not sure if hairspray will be enough as an adhesive or if you will need to use caulk. Once you build the bolts, sew them into your base wig and use hairspray to blend the wig into the bolts.
See me at Vancouver's own Anime Revolution in August 2012!
See me there as Lumpy Space Princess.
Princess Bubblegum-Adventure Time
The Flower Card-Cardcaptor Sakura
Rika Furude(school outfit)-Higurashi No Naku Koro Ni