Jay, in the days that the Logic's were around, Bell was using QUJ8a, 9a or 10a KSU's all Northern Electric (later Northern Telecom, now Nortel)
Within the KSU, you had "KTU's" for the different applications such as QUN10 for the lines, as well as 7, 8 and others for the special ops needed.
I recently threw out a QUJ8a last year when I was cleaning out the garage. I'm sure you can still find some of this in operation around Mtl.
BTW, for Ed's knowledge...66 blocks were still in use very much so at THAT time until Canadians "Modernized" our systems...still waiting for the US to catch up
If I come across another one, I'll let you know.
You might want to check with "Deltatech" on Decarrie Blvd. Minn might have one or can get one for you.