Recently discovered this company on Instagram and turns out they're local to me. Really nice husband and wife mom-and-pop-type shop. And no shipping charges for me since I can just pick up what I order. No affiliation with them, just sharing their site for those needing parts. https://www.thompsonguitarandthrift.com/
I've bought one of their Filterbilly Alnico V Filtertron Style Humbucker Pickups. I haven't put it in yet but the quality looks far better than other filtertron styles in this price range. They shipped fast too.
I wish I had a shop like that near me. I liked that everything I looked at was made in Korea instead of China, usually better quality.
I think it sounds really good. I installed it and wired it to split. I'm not a pickup expert but looking at it I think it's really a humbucker wrapped in a filtron case. I don't have an actual filtron to compare it to sound wise.