Front Runner Outfitters Stainless Steel T-Slot Tie Down RingsEye

Great product - TruXedo Elevate Tie Down Kit 1118459 Fits T-Slot Compatible Tie Downs

I found and tested a pretty cheap and easy way to add a couple tie down anchors in the Tacoma

tragamonedas slot A Video Of a few of the many ways to attach a tslot extrusion using the anchoring fastener

twist slot As you can see, the 78 for the T-Slots is not very grippy The stock height of the tie downs is almost 1, so quite a difference I don't know