You will probably have to build one. See this thread. Read the whole thread 1st, then look closely at post #15. There is probably no more than $15 USD worth of parts needed.If you need help or clarification, please ask. I will be glad to assist any way I can.
Link: http://www.plctalk.net/qanda/showthread.php?t=50546&highlight=d100
Edit:
Search ebay for this " Cutler hammer d100 plc computer direct connection cable" (without the quotes). I found a couple of ready made solutions.