This is what they look like for reference:

Iād be surprised if Ariat still makes this exact boot but yāknow what Iām bored, Iāll go poke around online and see if thereās anything stylistically similar.
EDIT: Iām not seeing anything that seems really similar to these, closest I see on Ariatās website in terms of the overall look/shape/lack of chunkiness is the Sutton II which straight-up says not approved for riding. My Lakelands are pretty much all-around winter boots these days.
EDIT 2: The Ariat Lakeland is waterproof, Iād say the few times I rode in mine, generally fine to ride in b/c they donāt seem as āchunkyā as some country boots and pull-on so no zippers to die. If you somehow can find a pair or if it turns out Ariat/another brand has something similar if you like these specifically, then go for it, Iād say.