unless you know how to build its equivalent from scratch, you can get the male to male gender changer and null modem adapter at radio shack, just tell them u want a male to male gender changer and a null modem adapter, both 25 pin. thats all i did. for both of them its like 10$ >Where can I get a null modem adapter? what is it? what does it look like? do >i really need it? > >