zeus g1+ co2 cap part needed

[ginoe]

the black knob and it's retaining screw came off the co2 cap - where can i get a replacement? (see inside red square).

http://i21.photobucket.com/albums/b255/ginoe/zeusg1plus.jpg

[20 yr old Faust]

From Warsensor's website or a warsensor dealer..