I thought I was gonna be screwed cause I also sold 2 of them but right now I have three different Atlas Interface paths on my galactic map. I finished three of them last night and it gave me a new one every time. I'm up to 8 stones so I'm gonna do a couple more tonight and then go to the end of the original Atlas path I had and see what happens.
Edit: turns out I'm in the same boat. The next interface I went to said it was the last one. I was hoping I could get atlas stones from them. Time do do a lot of warping!