Need help finding cheaper shells

[Hermit crab lover 37]

I have nearly 3 dozen shells in the tank but my baby still refuses to switch so I'm trying to find new shells. All the options but one are too big or too small, and the one listing I did find was around 60 for 3 which is way too much for a gamble. I was wondering if there were any cheaper options with around a 1.6 to 1.8 inch opening. Thanks in advance

[wodesorel]

Do you have any photos of your crab and the extra shells? Most crabbers panic, read too much stuff online, and then spend too much on shells that are oversized. I'm betting what you have now is likely fine, and your crab is just happy where it is! Many crabs will stay for years in the same shell before needing or wanting to change.