As I wrote previously, I am going to be hosting the files/content for David White’s Anglican Gradual & Sacramentary. For more information on this resource, check out that initial post.
I have an index page up from which the current and corrected files can be downloaded. For the time being, it’s functional rather than pretty—pretty will come later. That page is located here.
Particularly pertinent for the present time, the propers for Corpus Christi are located in the sections labeled “Temporal Cycle–>Moveable Feasts after Pentecost”.