Dirk/Wouter-
If they've got the "old" jibs laying around to rot- What about modifying ala a Hobie 16?? That is sew in some jib pockets, round out the leech (ala the 16 jib) and add a new clew plate to allow sheeting to blocks on the front beam? Could even add the tracks on the beam ala the H 16- Wouldn't be self-tacking but would clear up the tramp. I believe the Spitfire or Stealth has a battened self-tacking jib??
Just a cheap thought--

Kirt