Ability to generate one EDI AR Invoice file per extract

I have a client that does not want to extract in the EDI 801/INO extract process certain Invoice Types per customer.  Other than assigning a separate BT Address for these customers one thought is to move or remove the INO file thru a Unix Grep command and when it finds an invoice it does not want it will move/remove that file.  But that solution depends on individual INO files being generated for each invoice going out via EDI.  Some extracts may have 50/100 or more invoices in one INO file.

Has anyone come up with a way in either the standard INO Extract Parameters to modify to create individual INO files for each eligible Transaction Number in the parameters LOV?  Or create a custom Extract by adding the Invoice Type as a Parameter?