Replacement Part for broken plate release button retainer ring

I’m searching for replacement part: Retainer ring for Cuisinart GR-4N Griddler plate release button on right side of lid. Oval shaped, long axis about 25mm, black plastic. Any suggestions on where I can get one?

crwdns2934089:0crwdne2934089:0 crwdns2934093:0crwdne2934093:0

crwdns2934109:0crwdne2934109:0

crwdns2889612:0crwdne2889612:0 0
crwdns2934285:0crwdne2934285:0