Curiously, it seems like there were actually at least 2 seperate winglet retrofits for the MD-80, both of the blended winglet type, the first (1-2) being very similar to aircraft such as the 737 NG and A320 NEO, apparently with American as the sole customer, the second (3) appears to resemble moreso the more flowing design of the A350s, and operated exclusively By TranAir. As again, this was extremely rare, and barely any photos online exist of these curiously converted aircraft. Not much else is known.