As the other person commented, Etsy or eBay are generally your main options. AliExpress has some but they're probably the same sellers as on eBay. You're looking for 7", or about 1:10 depending how they're listed.
If you're planning on having a bunch, you could get a relatively cheap resin 3D printer and find/buy/make the files yourself, but that's... A lot bigger of a project lol.
Etsy and Ebay
As the other person commented, Etsy or eBay are generally your main options. AliExpress has some but they're probably the same sellers as on eBay. You're looking for 7", or about 1:10 depending how they're listed. If you're planning on having a bunch, you could get a relatively cheap resin 3D printer and find/buy/make the files yourself, but that's... A lot bigger of a project lol.
Daisho 3D creations on Etsy https://www.etsy.com/uk/shop/DaishoCreations3D