Yea, the store has a steamroller, but I'm not sure if it's from the film. The store is the one across from the Honey, I Shrunk the Kids playset, and near the exit of the tram tour. It used to be themed to roger rabbit (similar to the ACME wharehouse from the movie) then it was changed to a goosebumps theme, now it is sort of a cross between the two, with leftovers. Too bad a real Roger Rabbit attraction never made it to the Studios!
Lately, Roger (but mostly Jessica) has been making a comeback at DL in merchandise, but I haven't seen much of anything at WDW. They have made several pins of Jessica in the past year. The world of Disney at WDW has a 15th anniversary watch with a figurine of Jessica, Roger, and Benny. I also found a Roger Rabbit stuffed animal at Disneyland this summer, as well as a pullback car, but that was it. Disneyland also released one of those Toontown Holiday Houses of the Ride building from DL. I also think Jessica and Benny WDCC figurines are coming out this year.