Our old air conditioner finally died after over twenty years. We saw a LG (model LT1016CER) through the wall that would fit the old sleeve. This was during worst heat wave of the year. Ordered the unit through customer service and asked if they could put a rush on it as it was 91degrees in the room. Unit arrived at our local Low’s in five days. Service great, air conditioner great and runs quiet. 
Thank You