They are found on page C 68 of the People's Anglican Missal and HERE on www.episcopalnet.org.
Use your Missal or print the propers, and then "have a go" at the puzzles, remembering that we generally use ALL the available parts of the Sunday mass propers (Introit, Collect, Epistle, Gradual, Gospel, Offertory, Secret, Communion and Post Communion prayers).