Cool. I think there is 2 diff size o-rings that make it fit. You only use one I think. Let me know how much you want.
Well, can't find that damn ring. This is the one that just uses one ring - think it's a regular P1 (black). Sorry man, but if you still want it, PM me and I'll send over my paypal - I'll shoot it over without the ring if you'd like for $10. Up to you, but you may be better off with a different option. Good luck either way, and I'll let you know if it turns up.