Does anyone happen to know the sizes of the two orings in a crossfire stealth reg? The rebuild kit (2 orings and a piston seal) is $8 plus shipping and all I need is the big one that goes inside the bonnet. I can pick one up at the local hardware store for 25 cents I just need to know the size. It got shredded when the bonnet came loose and started to unscrew while under pressure.