Call a dealer or call Jayco directly. The original table is very heavy press board. If you can measure the space the table drops into to make a bed you could make a table that is lighter weight and sturdier than the original. We use our table outside. It got wet and swelled up on one side. I had a co-worker who has a wood shop above his garage make me a new tabletop from cedar. 1/3 the weight of the original, far sturdier, and pretty much it's waterproof.
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Chuck
2013 Jayco Jayfeather X20 E (sold)
2016 Chevy Silverado LTZ 2 Z71 Crew Cab (sold, and dearly missed)