Amazon has "FRAM CA10491" filters for $12 right now, and there's a review that confirms what I suspect/expected, they're Donaldson P611720 filters (in my experience Purolator/Delco/Napa all rebox these Donaldson filters). Anway, hat's an epic price! I picked two up, it's showing 6 in stock at the time of this post. Hope a few more are able to snag em.