[MT-AU Public] UPS Serial Cable

Hi guys, we have got some APC UPS's with the serial DB9 connections on them but need to connect them to Mikrotik RB2011 and RB1100AHx2 models. Does anybody have any suggestions on a cable to suit ? The problem is they are both setup to be the B end of the situation and not the MT setup to be the A end and the UPS as the B end. I was thinking of a gender bender but don't really want to do that if I don't have to..... Any thoughts would be appreciated. Thanks Paul