I've searched the item directory, and tried the CW shop though I'm not really adept at searching through it. And I was wondering if anyone knows any shops or items that are good for centaur characters?

Horse-like sets of two legs:

For CWs, it might help to search specifically in the bottom layer, unique limbs category, especially if you're open to two-legged versions. Here are a handful with four legs, though I'm not sure on current availability of any of them:

Holy wow, thank you!

There's also the

Subetalodge has previews of both the male and female sets here

already mentioned the legs from the set c:

Ew. Centaur..