PC: RI lines, and PC signal question

["Chris Osterhus" <su_carbs@xxxxxxxxxxx>]

>No, not all of them. Major lines like the "Cotton Rock" (Kansas City to
>Tucumcari, NM) and the Spine Line (KC to Twin Cities) are run by UP, and
>a number of shortlines and regionals operate smaller segments, but
>other lines like the Choctaw Route (Tucumcari to Memphis) are mostly
>dirt roads today. (The St. Louis to Kansas City route was inactive for
>a number of years, although a couple years back a shortline was trying
>to revive it against UP's wishes...don't know what came of that.)
>
>Alright, enough Rock Island, back to the Penn Central...
>
>-JWJ

The only line I can think of is the Keokuck Junction (?) This line is still 
running.

OK, on to PC content:

Does anyone know of a source on PC signals? I'd like to scratchbuild a few, 
but I don't know the dimensions. I have a few photos, but they're a little 
faded, and I can't make out the details. Any help will be appreciated.

--Chris Osterhus
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