I bought my son a Mickey head soccer ball Christmas tree ornament from the Christmas shop in Liberty Square a few years ago. They do personalization in the shop, so we had it personalized with his name. Also, I may have missed this above, but Italy, Germany and England in World Showcase all have soccer items. There’s also the store in Downtown Disney (can’t remember the name right now). They have international and local team jerseys and balls, as well as shoes and other misc items.