Among the treasures on the bi-lingual site of the National Council of the Vincent de Paul Society in Canda is a page where one can download a copy of the liturgy for the feast of Blessed Frederic as well as for the feast of St. Vincent de Paul.
Both are available here or visit the main site at: http://www.ssvp.ca/en
(post updated July 19, 2007 to reflect new links to the resources)