call paul at Impusle he shoud be able to get you some or tell you were to get them. www.Impulseturbo.com
I actually just got a head gasket from him tonight. He's out of town and had another guy pull a head gasket for me to pick up (what a man!)
With the level of boost I'm running (16-17) he wasn't sure it would need the hd studs and has both good and bad experience with the standard and the hd studs.