I am looking for an Op-Amp with a total supply voltage that is greater than 50V. Can anyone tell me an Op-Amp that has this specs? The more options I have the better.
This will depend. Then you say 50 volt do you mean +/- 25 volt, or single supply 50 volt, or +/- 50 volt.
But anyway look at OPA445 http://www.ti.com/lit/gpn/opa445