@mindelzkix Thanks for the question!
Similarly to the previous post, the REI Igneo 25 sleeping bag would be the best option. It is worth bearing in mind, however, that the Igneo and Joule sleeping bags have zippers that come up over the chest area of the bag, which would not be able to be zipped up all the way if you were joining two sleeping bags together. Additionally, the most important thing to look for is a sleeping bag with a zipper on the opposite side of yours (right hand or left hand).
Hopefully this helps, thanks!