It's funny that you mention it:
I was going through my old INSIDERS this week and saw an article about a Joe Johnston Portfolio from '79 or '80. Sansweet and Gus Lopez both mentioned that it was one of the first ESB items available. Do you think they made a mistake and mean the ILM in-house set?
I've put the books back already or I 'd hunt the article down. I think it was in one of the earlier (#25-#50?) Bounty hunter, ESB anniversary, or Fett-centered issues, though.