Help!!! I have some step pad inserts for...what I'm assuming is the running board because of the underside clips/mount, what ever you call it...that come with them. I have scoured the internet trying to figure out what year/model these are off of, the curved ones are 21.5 long by 3.25 wide, and the straight ones are 20x2.25. They all have a sort of upward curve when you lay them flat as though they would sit on a running board.

Any help would be greatly appreciated! Thank you!