The Soundbars dont have all the inputs the receivers do. I seem to recall finding discreet swithes for all the inputs with the ZA3000 Codeset. I dont have a Sony SB on display right now to verify though.

SOny TV's should work with these codes
[Link: files.remotecentral.com]

If the dont, see Above CH_ anchor recommendation.

And sell your client a new remote.