We have a VFP application which makes Autocad automation for printing dwg drawings on side A (front) of a A4-format sheet (i.e. 10 drawings).
After the printing, the operator reverses the sheet (i.e. 10 sheets) then, on the back side, the same application prints a VFP report based on a cursor which contains additional information pertaining each drawing.

In order to avoid the additional work of reversing the sheets and, mainly, the possibility of a wrong coupling of printing drawing vs information due to wrong paper feed, our customer bought a laser printer with the DUPLEX device (Epson AL-C900).
Now, with the printer it’ s easy i.e. to print a 3-pages Word document on sheet A (pages #1 and #2) and on sheet B (page #3).

The problem for us is to print our CADdrawing/VFPreport on the same sheet, without the sheet to be ejected.
We posted the question to Epson-Italy technical team, but the answer is that after an application printing (i.e.CAD), the sheet may not be retained inside the printer so as to be used for the next print job.

Now, the question is:
Is there a method to combine the two print jobs so as the printer may interpret them as an unique job and so perform the print-duplex operation (Drawing1+Back1(Sheet#1)+Drawing2+Back2(Sheet #2)…DrawingN+BackN(Sheet #N))?

Or is there another way to reach the goal?

TIA