Which is better for decoration purposes. Such as a decoration a cupcake ie. tie, baby foot.
IT depends what kind of decoration you are making. I usually use a mixture of fondant and gumpaste.
You can but fondant online from many cake decorating supply sites...there's soooo many to choose from. And I'm with Rylan...I like to use a mixture of the both.
Have you looked at GlobalSugarArt? Satin Ice is one that a lot of people use... you can buy it from GSA. HTH.
I use a 50/50 mixture of MMF and wilton gumpate.. But I use the wilton gumpaste powdered mix that you have to prepare..