Can I pull the stock sms app from my att i27 Mega? topic

I gave up hope of root and custom Roms and got myself a sony xperia Z Ultra which I really like other than low volume and I REALLY miss the stock messaging app for the adjustable font size with the volume controls (get tired of grabbing my reading glasses )..... AND the ability to delay/schedule ssending texts.......

So if there is any way I can pull that app from my mega after i have lost root / been force fed the 4.4.2 update.....And before I sell it..... or if anyone can point me to a way to download that messaging app... I would really appreciate it!