Miscellaneous Need to print with a MX-M850

Hi Guys,

we have a 3 years old MX-M850. Unfortunately we didn't buy it with printing option. It's just a copier.
Printing option is out of stock and can't be ordered. But we are in need of using it as a fast printer.
On the right side I can see a Network Port with yellow blinking Led. Is there's a way, legal (or less legal :confused:) to let it print from my network?
Where can I buy a Used Printing option?

Thanks a lot for your help.

Vincenzo