I seem to have the same problem, so I follow your lead. So what I want to tell OP was.
In my country a regular toy store works perfectly fine, some time even a bigger well stoked grocery store. You can usually find at least two whole shelf just for different stim toys.
https://shop.autisticinnovator.com/collections/stim-toys
Mentioning your region would be useful for shipping costs.
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I seem to have the same problem, so I follow your lead. So what I want to tell OP was.
In my country a regular toy store works perfectly fine, some time even a bigger well stoked grocery store. You can usually find at least two whole shelf just for different stim toys.