I agree with the others. It's really not worth the fight. I would get a better quality TV that you like and move on.
That being said, I would contact Jayco directly (NOT through the dealer, but don't tell the dealer what you're doing) and tell them the story. Include a copy of the receipt for the new TV in your correspondence along with your trailer's description and VIN. You never know, they might take care of you as a measure of "goodwill". It's certainly worth asking.
You could also contact your warranty company directly (assuming you haven't already) and tell them the situation (that OEM is not available). The worst they can say is "no".
2014 Jay Flight 28 BHBE
2015 RAM 2500 6.4L HEMI, Tradesman 4x4, 3.73
Blue Ox SwayPro (BXW 1503)
Upgraded from an REI internal frame backpack and a Eureka 1/2 dome tent!