> For exactly, would a copy of "Love Trance" or "Madrugada Eterna" ETERNA1 have caused a frenzy back in those  
days?  Wasn't even the rarer examples of the "regular" back catalogue (such as JAMSCD4 and "Space") available  
mail-order during the Stadium house period?   
 
They were big ripples in small ponds : pre "3AM" the circle of KLF fans was small, but fervent.  I think they were available during the "Stadium House" period, but hard to find / mail order only. "What Time Is Love Story?" wasn't available. That fetched a huge price then as it does now.
 
  > PS - Does anyone know if the 1991 "Pure Trance" reissues (4T and 5T & R) were legitimate KLF reissues  
sanctioned (and presumably actively wanted) by Bill and Jimmy? 
 
Probably not : at the time Bill & Jimmy seemed far more interested in the present and the future, not the past. If they were going to reissue anything they'd probably add a death metal thrash backing, sheep, choirs going "Mu Mu", dress up as Ice Cream Cones, get guest vocalists and rappers, and put a model submarine on the cover.