Can someone tell me where I can find this?

It's the power connector that goes into the XM unit of my D2. It's a three pin connector with two holes (power and ground).One of the wires came out so I put it in and taped the wires together as a stopgap measure. Every now and then over bumps and/or turning the XM shuts off and I think it's one of the wires coming loose out of this.

Where can I get a new one of these or how can I fix this problem?

well you should be able to call pioneer and order the part (you may have to but the whole IP-bus cable) or you can go down to radio shack and get some crimp on connectors that will fit on to the pins, however with out the harness it will be easy for the wires to come loose if the unit is not securely mounted and just stuck behind the dash (some hot glue will help to hold the wires and the pins)