if its a bad spool oring simply replace it with one off this spool http://www.zdspb.com/store/solenoidparts.html
. Its the k3hxx spool that you want, then remove the new orings from the k3hxx spool and replace the dammaged seals on your luxe spool with them. at $5 an oring($20 minimum) it is much cheaper than buying a new noid. you will also have spare replacement orings in case spool orings tear again.
also the luxe solenoid(parker noid) is 3 parts, a coil, a pilot, and a spool/spool housing.