First released in September 1987, they were recoded as 4402 & 4403 in 1988 and 070510 in 1989. Shame that they were never shown in the 1988 or 1989 catalogues!
RTO2 Space Orks - Sept 1987 Flyer
RTO2 Space Orks - WD93 (Sept 87)
RTO2 Space Orks - RT1 Flyer (Feb 88)
4402 Space Orks - Aug 88 Flyer
4402/3 Space Orks - WD106 (Oct 88)