I ended up replacing both of my front calipers back in July. I didn't realize I was going to need to replace them till I'd already started the brake job, I had only been planning on pads and rotors. I wanted to get it back together that day, so AutoZone was the closest place, they had them in stock. I wouldn't buy from AutoZone again, when I opened up the calipers to check them they were two different colors. I mentioned it to the clerk, he said they were the last two in stock. Oh well, whatever. Couple months later one of them is now orange, because it's surface rusted.
They work fine, but the difference in color now is really aggravating. Eventually I'll get around to pulling the wheel and painting the rusty one silver.