The polish is Summer Peach by American Apparel's Nail Lacquer. I don't usually like American Apparel's nail polish because I think they charge too much, and the last color I purchased from them seemed watery and dried a different shade than it looked in the bottle. However, since I had been on this search for so long, when I saw this color sitting on their counter display I had to give them a second chance (I also found it in an American Apparel outlet which brought the price down a little)!
Another thing I thought was worth mentioning is that I use Sally Hansen's Mega Shine Extended Wear Topcoat. I never used to use a topcoat, but it really does make a difference and this Sally Hansen version has been compared to many more expensive brands which claim to lengthen your polish's wear.
If anyone has found another pretty peach color that can be found in drugstores I'd love to know!