Swapping out OEM seat covers

Alright guys, I've got the SR5 seats with the fold flat on the passenger front seat. I found a brand new complete set of OEM TRD seat covers off of craigslist from a 2012 sport. Was wondering if its as easy as swapping the covers or does it require the complete seat? I've searched and searched but could not find a direct answer. Also I'm not sure if the fold flat would cause issues fitting the front passenger seat or not. Thanks

 

The "sport seats" that come on the TRD sport and TRD off road are shaped different than the standard SR5 seats. One very noticeable difference is that the sport seats stick up on each side of the headrest like a hunchback shrugging his shoulders. The SR5 seats are flat across the top.