A serigraph is a print made using a silk-screen process. Doubt it was difficult to use the original to make the print. Chief Fake Injun was probably running a t-shirt silk screening business on the side.
On which side of the silk does one draw the image?
Peyton, you gave me an idea. I Googled Churchill and silkscreen, and the work of "art" is on Ebay!
Quick, someone capture it before it goes down. I am good at some things, but this ain't it...
http://cgi.tw.ebay.com/ws/eBayISAPI.dll?ViewItem&category=360&item=7301790643&rd=1