So, to complete Alan's Contract #60 you must send out 18 QR Tilt Diesel sets which are a diesel loco with 14 passenger cars. I click the set in the contract and it says some of the items are being used and to check my trains. I have no tilt items on any of my trains, either in the Station, IT or depot. In Storage I have both locos, diesel and electric, a tail that only works with the electric and 13 tilt passenger cars. I can't find the fourteenth car in my trains, nor can I find it in the shop to buy the last car I need. How do I finish out the contract?