Getting a PDF file out of a Servlet (Websphere Version: 5.1.2)

Getting a PDF file out of a Servlet (Websphere Version: 5.1.2)

Our app needs to produce a batch of PDF files, pure PDF file, to be sent
to our print room. Currently, the only method we have available is to
either send our XSL-FO code to the servlet (which can interpret it into a
PDF, but not send it to the print room) or to use the PDFWriter (Which I
believe is too imprecise for the level of definition we need, though I
could be wrong).
In our version of websphere (where FopFactory is not an option), is there
any other method for producing a PDF file that we can then send out within
the app?