I have priced the cable from verticle express(vertex). I can buy it from them, but was looking for someone no longer using theirs. Or like you said can I buy it local from a electronics store. I have seen the inside of the 25 pin end and it has a same board in it. Not sure what dover was doing when communicating with the dmc. Is it no more than a converter from a rs485 to rs232 (9pin to 25pin)?