You got lucky. Being more than 6% off level for an hour or more usually is death to these critters.
Check your model fridge at Dometic.com parts, or you could see if Beaver Coach Service has the gaskets and/or advice thereof for your model 1492 (I think you said?) on hand; it seems to me to be a common model among our rigs.
But it would be important to me to make absolutely certain the issue isn't with door alignment first... been there, done that more than once. No point paying for a new gasket that's not gonna fix the problem. Adding secondary weatherstripping isn't a permanent repair, and may in fact interfere with actual proper fit. Some sort of stress like someone leaning on an open door or other inadvertent event can easily distort it. Carefully eyeballing it and judiciously manhandling it back into some semblance of square has worked for me in the past, but it could also be that one or more of the hinges are loose or perhaps just worn.
Joel
