IG 88 was successful in tracking down the millennium falcon. It has been suggested in the EU that this IG88 was destroyed by Boba Fett on bespin. Or even in his ship I could imagine IG88 trying to sneak aboard and ninja kill him but Boba was not willing to let his bounty slip through his fingers. If ESB had been made in 2005 Boba would have had a battle scene with IG88. But thank god it was just a little nod. But it doesn't need to be painted because there is 4 IG88's in the star wars universe.