OK did this to myself so Only I have to blame for this.
I reset my Drives to Raid and Killed my Preinstalled OS of Windows Server 2012 R2 Std.
Anywhere on Dell can I download an ISO File?
My Dell OS Key will not work with the Eval Version. I tried this first.
Of course it will - I use it all the time. You must do it from the Command Prompt though - you cannot use the Activation page.