H1b Extension without client letter-help needed ASAP

[firstext]

Hierarchy

client --> business partner --> preferred vendor --> vendor-->my employer

My client and business partner refused to give letter for h1b extension...now my question is will my h1 get extended if i submit Both vendors letter...?

Is there any one who got approvals recently with a case similar to me? If yes please suggest me how to put the documentation to get H1 approval without any RFE ..Any help is appreciated...

Thanks in advance