Where can i get good custom eartips

Hello, I have a a pair of moondrop S8 and I've been struggling to get a good consistent fit with them. Is their a way to get custom eartips for them for my ear shape, if so where and I'm also on a bit of a budget so the cheaper the better unless their is no other choice. If possible I would prefer it be in person as i feel like it would allow me to get what I'm actually looking for first try. I live in the the Chicago land area if that makes it possible to go in person for it. Thanks for the help