Hi @Ginsberg - Thanks for reaching out!

The current Kingdom tents and additions connect using clips, whereas the 2011 - 2015 models use a Connect Tech zipper system. Because the clips and zippers are not compatible, we do not recommend using them together. While there are not currently any available, we suggest keeping an eye on our Used Gear page to see if any of the older model Kingdom add-ons are listed.

This topic has come up previously a few times in the community, so we are hopeful someone will be able to share their advice too. @Wren, do you have any suggestions to share from your Kingdom tent add-ons experience?

At REI, we believe time outside is fundamental to a life well lived.