Thanks to a Forum post by Ash: an American-made bag that new to me, BAD duffels. The bag pictured below is the #3 which has max carryon dimensons (21”x13”x10”). I prefer skinnier, more rectangular bags, but if you’re a duffel person, BAD might be good. The compression straps will probably help keep it legal size and it has pulls and handles out the wazoo.