The scan is here:
http://www.christusrex.org/www1/pater/lingue/breton404.jpg
This is the text the Roman/Latin alphabet:
http://campus.udayton.edu/mary/resources/flhm02.html#breton
Notice that a lot of the letters look to be influenced by Greek, and that there is a one-to-one correspondence between the latin alphabet and this alphabet, except, for "ch." I've already tried e-mailing the guy that posted the scan, and the e-mail doesn't exist any more.
Any help is appreciated.