Actually, it's not difficult to get a gift.
Give two suggestions.
The first is that you have to make it clear in the letter, such as I want someone's signature or something. Foreigners do not like beating around the bush. If you want something, others will be satisfied. Many fans in China are embarrassed to ask for it. This is their own loss.
Second, try to bring some small gifts to each other in the letter, so that you can give them back to others. You don't need to exaggerate something, such as a Chinese knot, a trinket with China characteristics, or even newspaper clippings about Milan. The key is to make Milan club feel your sincerity.