Our Pinnacle did not come with a fireplace, DW wanted one so I added one.
Bought it off Ebay from a RV Surplus vendor.
Easy install since it is the same Brand / Model that Jayco uses and plus Jayco prewired for the Fireplace with a plug in the back of the cabinet where the fireplace goes and dedicated breaker in the fuse panel for the Fireplace. All I had to do was plug in the Fireplace.
It was a new takeout and got it for less than $80 plus shipping.
I also installed a Jensen 12 Volt powered Sub-Woofer behind the fireplace, BIG improvement in Jensen system sound quality.