@JK Lewis - Justin, speak to Hunts mate. They've got a steady supply so should be able to sort you out.
With regards to Serbian willow, I have one in my possession that I've used for a few nets and so far there's literally no difference between it and my English willow bats. The response is just as impressive and no noticeable damage/defects etc.
I haven't sold any through Neon yet, but am considering offering it as a slightly cheaper option for 2019 should the interest be there (I should stress slightly cheaper, as there really isn't much difference in price between Serbian and English).
On that note, if anyone would be interested in a Serbian willow bat then feel free to get in touch and I'll look at the prices etc.