No see I'm looking for ONE widget like thing that would have links to all the stores. Not just iTunes. Whatever stores I want it to have a little button for, iTunes, Amazon, CD Baby, Google Play, etc etc. All nicely arranged within a little UI.
Anyway for now I've given up the search (I looked EVERYWHERE), and am just using Envira Gallery to create a nice evenly sized gallery of side by side pictures of the store logos and then make each image clickable as a link to my album on each store. It works, but it's not ideal.