Some users created for CPT 3.3 free repertoires. Through the following links you can still download (ZIP files) and import them into CPT 4 (choose "old CPT 3.x version" as import type):

Kasparov

Benonian by Strapazer

C57 Two Knights Defense

Cameron Soran's Black Repertoire

Cameron Soran's White Repertoire

Caro-Kan

Damion Defense

Dynamic Opening Repertoire

ECO-Codes

French

Grob

Poe Black Repertoire

Poe White Repertoire

Ruy Lopez

Scandinavian Qa5 by Sinz

Spanish Morphy Defense

Svenishkov Update

Svenishkov Black