25 sellers ship to Serbia

Here are a couple;

northcollective (deutschland)
https://littlebiggy.net/link/NfWvNM

DrTonyChopper (spain)
https://littlebiggy.net/link/9djkBE

Message them before you order and explain/discuss, they will let you know about the process.

In the 'items' tab select serbia as the country and you will see more sellers.