If you own a late or recent Shoei RF1000 or similar, it should come with both the chin curtain and breath guard. If not, you can e-mail them at
sshc@shoei.com and give them the model and year of mfg of the helmet. Items worth 40bux and very useful too. Just FYI.
I received an e-mail confirmation, so I should be getting mine in the mail soon.