how to proceed H1B Visa stamping once client location changed?

My H1B recently got approved,now I need to go for H1B stamping.

I filed the petition for the Client “XXX” and the work Location “YYY”.

Now my Client (same “XXX”) closed their office in “XXX” and moved to “ZZZ”.

Shall i go for stamping with the old documents or I need to apply LCA ??

** My petition is valid for 1 Year only… It ends by October 30,2017.

Could you please tell what should i do as procedure before going for stamping and after stamping??