I have always made my own lentils (from dry lentils) and I still will, but sometimes I don’t have time...and I have found canned lentils to be hard to find at the grocery store.
I bought these on Amazon (12 pack) at a good price - highly recommended!
I also got a 12 pack of the black lentils, which I actually like even better. But they have less protein and fiber. amazon link