Cactus spike- buy gloves from pawn shop, go to desert
Uranium- talk to luthor bigbucks in casino
Scrape metal- help optimus at chop shop...talk to jimmy the neck...if u cant, first talk to tank(u must have friendly conversation with him, he'll agree to help, but once u tell him what u want him to do he wont do it, then go talk to jimmy...he'll help
Rubber wadders- look behind factory optimus works at...there will be a spot where u can dig at...u'll find the rudders


HOPE THIS HELPS