i'm looking for a 1/24 or so model (or toy) of a construction type self propelled derrick on tank treads. it doesn't have to be accurate, i use the 10 foot rule. i found a really neat one for $2,100.00. can't remember the source; matter of fact, i couldn't forget them fast enough. i was thinking more along the lines of lunch money. if any of you guys have any leads, i'd really appreciate them. thanx, and happy holidays.