I don't know what brands of coffee you have over there but (in Australia most people use electric kettles) I use Nescafe Decaff which actually tastes good if not better than the normal instant coffee. I was surprised! Admittedly the first few days I went through the headache bit because of the coffee not containing caffeine but that was because I was drinking around 3 to 4 cups a day. Now I can still drink that many and it's safe.
Surprisingly though decaff tea still isn't ok to drink. From what I was told by the specialist the decaff process for coffee is the only one that actually removes all the caffeine. If I want a cup of tea the only one I'm permitted is camomile. Because there's so much caffeine in soft drink, the only ones there I can have are tonic water, soda water and lemonade.