I believe it is part number 01E34617S01.
Pac Parts is on back order until February, and Partstore.com is also on backorder, and they can't tell me when they will have it.
This will be used for H700, to connect the controller to the main unit. Any standard 13-pin DIN cable will work... on one end only. I guess Alpine chose to make one end male, and the other end female. Most of the generic cables I've found are male on both ends.