They came with the pool. They’re missing the railing but it hasn’t been an issue. Facebook marketplace always seems to have them selling.My floor is extremely pitted as well, I'm guessing water got under there over the winter and had it's fun moving stuff around. At first I hated it but now it almost makes it easier to walk around, gives a bit of traction lol.
Did you buy those steps new or it came with the whole pool setup? I'm looking to replace the ones that came with my pool and I think those are the best looking ones.