Where can i find the flags used in...?

where can i find the flags of the two sides (union&confederate) used in the Great Locomotive Chase. Please Please PLEASE dont request using google, we've gone through tons of searches and that doesn't help answer our quesion. any pictures, links, etc. that have to do with the 2 sides and the flags would be great. plus, we need some of the info ASAP so any info real quick is awesome(: thanksss! :P