Any B&O dealer ought to be able to help out.  

👍

Sounds Heanenly click the on bottom of this page this guy is super nice and reasonable free shipping and fast talk to Steve

Yeah, I figured that, Russ!

With B & O moving to Cat 7 wiring, I would think there should be no issue getting that wiring on my own.  Does B&O offer end connectors only, or do I need to purchase a finished wire and cut off the dog tail (which is ludicrous to me, honestly)

As ludicrous as it sounds....  B&O offer an ML cable with only one terminated end for applications like yours.  Order those, the appropriate number of punch-down blocks and the bulk cable, or a finished cable in the length you need.  

As for complete DiY...the crimping yoo will set you back more than $900USD.

Russ

As for Cat 7, you probably ought to do it that way and only order the wall plates ans pig-tails from one of us.  At least you'd be a step ahead then.

Russ

I have access to a crimping tool, etc.  Once I map out how it's going to be wired, I'll roll from there.

In a search, I did find Bosscom has some perfect add-ons (including an outdoor mount for IR eye): yet, they are a wholesaler/supplier: anyone use one of their retailers n the past??