Marantz AV7005 remote repair or alternative

I have a AV7005 the remote RC011SR volume button does not always work.  My understanding is that this is a sealed unit that you would break if forced open.  I have tried Deoxit fader spray to no avail. Looking online I have not been able to locate the exact replacement.  I know that I can buy a pre programed remote that looks quite different than the RC011SR or a universal that I program.  Anyone find an outlet for OEM RC011SR or a way to fix the remote.  Suggestions ? Thanks, Bill