Reciept question.

I have been trying to get help from my local Camping World for a couple months now. Last year around March I purchased an ADCO cover for my travel trailer. I misplaced the reciept and am trying to get a copy of it from them. I am doing this so that I can attempt to make a warranty claim. I am a good sam member and thought that since they use my number during the purchase that this would be easy to do. I have not been told they can't get it but when they tell me they will look into it and call me back they never do. So my question is, Can I get a copy of the reciept?