Not sure on where to buy the furniture but it is a DIY project. The dinette removal is as easy as unscrewing and pulling staples in the wood that make the seats. If you have an oscillating tool, that will help with a clean removal process.
2017 Forest River Surveyor 247BHDS...
...Tugged by a 2016 F250 XLT FX4 SuperCrew, Shortbed 6.2L, 4wd, 3.73...
...Joined with a Husky Centerline TS 800-1200lbs WDH