One thing that maybe hasn't been explored by companies that deal with classic TV reissues when they're having problems getting all the episodes from particular series is trying to get the episodes originally dubbed into Spanish for the Latin American market. Obviously there should be lots of them, because even now there are many Spanish episodes of series like Combat!, High Chaparral, The Invaders, The Saint, Voyage to the Bottom of the Sea, Wanted Dead or Alive and The Persuaders on You Tube. Granted these are well known sucessful series, but I've also seen intros or short sections of less popular shows, leaving open the p[ossibility that there are full episodes available.