Wow, 3.600 Ft is about €9.40!I've never seen such halters before - they're pretty. On a German website they said they couldn't find these halters anywhere else but in Hungary and recommended this shop: https://www.equifarm.hu/products/csomozott-kotofek?variant=40010465902775
Based on the one Capalldonn posted, I figured out that they are called "peasant halters," and seem to only be made by a company called Equi-Time - or at least those are the only ones listed online. If you search "Hagyományos "paraszti" kötőfék", then it brings up quite a few places that sell it. Sadly none of them seem to ship to me, but I found at least a few that will ship to the UK.I tried kötöfek but maybe didn't dive deep enough as I just got a lot of standard halters.
In my experience of importing things into the EU (from Japan, China, the US and the UK) being hit for VAT is a bit random... A few months ago I ordered something from the UK and I wasn't charged VAT. I ordered the same article from the same vendor two months later and was charged VAT.I think there’d be import tax too?