I ordered replacement brush heads for my electric toothbrush and they've been solid, as far as I can tell until I go to the dentist.
Their manual brushes with replaceable heads also look quite decent though I haven't tried them.
Also they're pretty cheap and have free shipping across Canada for all orders! My order took maybe 2 weeks? I didn't keep track, tbh. But they're in Quebec and I'm in BC, so it taking a while is acceptable.
I have no affiliation with the brand, learned from them from a comment on reddit and figured I should post about them here.
Orraman Leather
Made in Scotland, I've had a version of the minimalist for about 3 years and it's only getting better with age!