THESE HAVE BEEN PICKED UP.Heavy duty front and rear floor mats. Deep channels. We've had them in Kathy's Infiniti J30 (provenance!), our Tahoe, and the Blue 'Burb.
Kind of like me: Not sexy, a bit old, but still functional.
https://photos.app.goo.gl/ay9nyFddAyGKeKEn9This is on Google photos so you might have to click on link.