EDI for Inbound Invoices

We have several vendors who wish to provide invoices to us electronically.  For the first two vendors we set up an FTP server where they would send their invoice files and we wrote programs to grab their files and load them into the JD Edwards Z files.  So, we now have two sets of programs; a set for each vendor.  Before we develop too many more programs, I'm wondering if it would be easier to establish an EDI process for importing these invoices.  After scanning through the JD Edwards documentation on EDI, it looks like the first step is to find translator