I ordered 2 milk snails on Amazon last year in October and I am still super happy with them. They laid eggs a week after I got them...unfortunately I ruined them unknowingly. Here's the link:
https://www.amazon.com/gp/product/B08D6Z1117/ref=ppx\_yo\_dt\_b\_search\_asin\_title?ie=UTF8&psc=1
And these are the snails: https://www.reddit.com/r/snails/comments/sxxe7q/i_have_a_few_questions_about_my_2_milk_snailsmore/