WHERE CAN YOU GET DECAF COKE/PEPSI?

I'M TRYING FOR A BABY SO REALLY NEED TO GIVE UP THE CAFENE. I DRINK LIKE 2 CANS OF COKE/PEPSI A DAY SO I WAS WONDERING WHERE YOU CAN GET DECAF COKE? I'VE LOOKED IN A FEW SHOPS LIKE SPAR BUT I CAN'T FIND IT ANYWHERE. I KNOW THEY DO SELL IT SO ANY HELP ON WHERE WOULD BE GREAT. :)