If the goal is less expensive tires, it probably ain't gonna happen.

The lowest price on modern tires is usually going to be some kind of a take-off, like
police car 18s that required a plug and because of that are no longer fit for police use,
half worn takeoff police car tires, and that type of thing. .....used to be widely available on ebay
if you're into that kind of thing. I looked, but wasn't into it....