jallen_100,
The MXI-3 Cabling Options FAQ knowledgebase article may have some of the information that you are looking for. Here are two of the sections that I hope you find useful:
Please note that National Instruments does not produce any type of bulkhead connector for MXI-3, because they might produce unacceptably high error rates that would degrade MXI-3 performance. Due to the proprietary design of MXI-3, it is highly recommended that it not be installed in permanent structures using feedthrough panels and bulkhead connectors. These types of connection solutions(bulkhead, feedthrough panels, etc.) have not been tested by National Instruments and we cannot guarantee performance or compatibility.
With that said, for the copper MXI-3 cable, the cable and connector type is called HSSDC (High Speed Serial Data Connector). This specific connector was produced by AMP, part number 1324640-2.
I hope this helps,
Eric K
Applications Engineering
National Instruments