You can get a re-seal kit here form Mad: http://www.mcarterbrown.com/forums/d...isc-parts.html
You can get a valve tool from Titus here: Celanis Paintball
or Pm him on here.
What is that gray spot on the valve tube? Is that a plug that high up the tube? What is in the end of the valve tube(bottom tube) ? It does not look like the original screw in plug.