Where does /p/ buy focusing screens with split-image for old aps-c dslrs ? I'm interested mainly in one for canon 350D ( digital rebel XT ). I've seen some offers on ebay and aliexpress for about 30-40 dollars. There is also site called focusingscreen.com and it sells them for about 77 bucks. Where should I buy these ? I hope some anons know anything about this topic.