Use your PC or Mac to duplicate the DVD.
My bet is common DVD standalone recorders will not work for your needs.
I have a DVD recorder attached to my TV. It has a built in VCR also. I dub from tape to DVD successfully and then tediously add Titles with the DVD recorder before finalizing the master DVD. I then place the master in my DVD player which is attached to my DVD recorder in order to make a copy. I am able to record/copy successfully, however, the Titles on the master DVD are not recorded onto the copy (I just get one Title). Any ideas how to get all the Titles to get copied the same as the master. ?? If I am unable to do this then each copy has to be made the same as the master which is a tedious job.
Thanx in advance