I concur with USGC485 - you should be able to get a copy from your lawyer or the county clerk. Mind you, that document will contain all the details of the divorce judgment.
Assuming that the divorce was processed in the US, another option is to contact the Vital Records Office in the state where the divorce was processed. You could obtain a certified copy of the record of divorce or annulment, which is a one page summary of the judgment. There is a cost associated with it and you normally receive the decree within a couple of weeks.
Hope this helps!