OLIVETTI PR2 plus Printer

[EDDYSEGAR]

 Hi, 
Brief detail about the Olivetti PR2 plus Printer.  It have a few printer emulation build in the printer, 
such as Olivetti PR2e, Pr2+, IBM 4722.

The USB to Serial converter which we bought locally can be used on all this printer emulation except for the IBM 4722 emulation.
My customers requirement is the printer must use the IBM 4722 emulation.

Can you advise me which Virtual Port software or USB to Serial converter will solve this problem?

Your immediate reply is much appreciated.