https://www.cousinsmainelobster.com/truck/las-vegas-nv/
Is pretty good ime (only 2.9 stars on Google though, no idea why).
I'm like you, a lobster roll is as you described, Connecticut style. A lobster salad sandwich is sold as a "lobster roll" in some places (and is gross too).
Surprisingly, Red Lobster serves one that is not terrible. I ordered the two lobster roll entree for lunch, added a tail, and put all the tail meat on the rolls. Amazing lunch for $28. I wouldn't recommend it over an alternative, but in SW Ohio, I don't have an alternative.