They have only just come onto the market. I tested some last year, but they were not then generally available.
Four suggestions:
1. Contact Aquila direct and ask them if they will sell you some or if they can tell you which stores have them in stock.
2. Contact Sutherland Trading. these are the UK distributers for Aquila. Ask them whether they have arrived in the UK yet and where they are for sale.
3. Buy from somewhere in Europe.
4. Buy from Elderly. I doubt if you will be charged VAT on such a small purchase.
Hope this helps.