If you are shooting a tech camera with a P1 back you may be looking for a short PC cable to plug in to the short Phase One to female mini-jack cable.
Paramount Cables makes custom cables. They appear to ship the same day you place your order on the internet. Here's a link: Paramount Custom Cables.
You are ordering Tip # 2 (PC) on one end and Tip # 39 on the other end (2.5mm molded straight). You can specify any length of cord, as short as 4" (I suspect that if you called them they would do shorter). Buy two so you'll have a backup. I'm using a 4 inch cable on my Alpa TC. Thanks by the way to Lance Shad for sending me to this site.
I found that the PC connection that Paramount provides is a bit snug on my Schneiders. I had a "PC tip conditioner" laying around and was able to use it to very slightly enlarge the Paramount tip. Everyone relying on a PC connection needs one of these things - you can use it to straighten your PC tip if it gets bent. Here's a link to B&H Paramount PC tip straighener.
Does anyone else find it irritating that P1 lists the short P1 to mini-jack cable at $150?