No such animal
I agree I've never heard of such an animal as multi-state CCW. Many states that have CHL like Texas have agreements with MANY MANY other states for reciprocal. unfortunately it is a hodgepodge of who allows it elsewhere - as an example Colorado and Arizona no problem full reciprocal but New Mexico CHL owners may carry in Texas but the right is not reciprocal Texas CHL owners may not carry in NM. It is a relative measure of the "liberal" status of the state in question. So long as those states know - I will carry everywhere I travel so all they accomplish is preventing me from stopping to SPEND MY CASH in their state or possibly defend their citizens from harm. Sounds like a lose lose for them.