Well you're definitely not going to be able to do it without root since it's a system file. If you try to install an .apk over the existing system file it just won't work without root.
If you do find the .apk let me know cause I'd pay $10 for that right now, it's really all I feel like this phone is missing! I think, however, it's integrated into the framework of the phone - since you can customize through the personalization menu - and that simply installing an .apk won't work exactly as we would wish! We're probably going to have to wait for a custom ROM to come out which hopefully shouldn't be too long!