To answer the original question: I doubt you'll be able to find anything like that. Your best bet is to make your own. A small 6-pin microcontroller, such as the PIC12F200 and a bicolour red/blue LED and some tiny resistors will do. To save space, you might be able to skip the decoupling capacitor, or use a low value such as 10nF, if it's close to the battery.