Just got 1993 30' Sierra by Cobra 5th Wheel. There is absolutely no information on the nameplate. I don't know what model it is or anything else. According to NADA.com there is only 2 models for this year and this length. I would love to get my hands on an owner's manual but have no idea where to obtain. I called Forest River, whom I assumed bought out Cobra and got no help. Any ideas???