Tru.Comfort Doublewide 20

Zenbify fits the design you're asking about, but is above your cost by a decent amount. They are super comfortable though, and I love mine. Might keep an eye and pick up on sale/discount or with a coupon code. I'd generally recommend 2 sleeping bags/quilts vs a shared double unless you both tend to sleep at the same temperature. You can also get sleeping bags that zip together if you do want to share space but have the option for solo/separate use. That being said, Kelty makes good stuff so I'd trust their double if it fits your needs.

I had one. It's nice for the price. But the packed size is huge.

My partner and I are on the smaller size (<5'6" and <150lbs), but we fit quite comfortably into the kelty double using a mega mat duo LW+. It is 100% a car camping only setup though. For backpacking Id personaly lean into the zenbivy duo with 2 individual sleeping pads as pretty well the only light enough option

I have the kelty and it’s cavernous and very warm been down to 30 on it no problem yet

Double sleeping bag rated for 20 degrees did the trick for my wife and I. It’s one of our favorite purchases for car camping.  We got the Kelty brand double bag. It keeps us warm down to about 35 degrees Fahrenheit. 

I have this and love it. I sometimes just use it for myself.

Also have the double wide for camping in my truck bed. I put some wool blankets inside with me and I'm nice in cozy in freezing temps.