I was occasionally Googling the source code out of boredom, and one day this yielded a bannister.org post of Sean claiming he had obtained a scan of the source

I was occasionally Googling the source code out of boredom, and one day this yielded a bannister.org post of Sean claiming he had obtained a scan of the source code from the USPTO. I proceeded to contact him and he proceeded to scan and publish it in a few days.