Well, I asked Sam's, and they said they did not sell TPMS sensors, but would install them for free if I provided them. I bought five Denso PN 550-0103 TPMS sensors from Amazon @ $33.13 ea. I bought four Cooper 265/65R17 AT3 4S tires from Sam's; Sam's is installing the tires and sensors Monday (2021-08-16) on my '09 SR5.

Meanwhile, my '07 Sport Edition proved the value of the TPMS sensors. I got a tire-pressure-warning light a couple weeks ago; one of my months-old tires was low. I aired it up and a week later the light was on again; this happened twice more with several days interval. The TPMS was warning me each time. I said to myself that this is getting serious, but I had never had a flat on brand-new tires before. Knowing that tire-repair places cannot find leaks in tires, I took the tire off to find the leak myself; it was easy; there was a drywall screw sticking thru the thickest part of the tread. I took it to the tire-repair place, and they told me to leave the vehicle and they would get to it in turn. I went to the auto-parts store and bought a repair kit, went home, and in five minutes, repaired it myself.

The bottom line is that I have had several flats on the expressway (very unpleasant), destroying the tire, and in one case, destroying the wheel. Tire-pressure sensors are great; I would never be without them again.