Here is a link to the facsimile of Latin works of Saint Peter Chrysologus, including 183 Sermons.
Among them you will find...
47. The Parable of the Pearl of Great Price (of last Sunday's and today's Gospel)
96. The Parable of the Cockle (Gospel two Sundays ago)
98. The Parable of the Mustard Seed
99. The Parable of the Leaven
Get into the Doctor of homilies!
Exercise your Latin!
Link to another edition of the same (somewhat clearer text).