Chris
I measured the KIK cylinder and according to the dimensions in this document
http://www.mul-t-lockusa.com/pub/Full%20Line%20Catalog-English.pdf it is a K017 which according to the chart is a Schlage A line knob (Plymouth Design). Unfortunately that doesn't help me select a BiLock retrofit as they only list these:
9308 Sargent Knob Cylinder
9310 Arrow Knob & Lever Cylinder (no Tailpiece)
9312 Yale Knob Cylinder
9320 Schlage Knob/Lever Cylinder Fixed Tailpiece
9322 Schlage DB Cylinder Floating Tailpiece (B160 Series)
9324 Schlage Cylinder No Tailpiece (A, B360, B660, Open back)
9326 Schlage Deadbolt Cylinder Floating Tailpiece (New B560 Series)
9329 Marks Knob & Lever Cylinder with Tailpiece
So is it the 9324 as this says a Schlage A but it says no tail piece which is what mine has.
I can see the photos -- wonder why you cannot. I can email them if you like.
Thanks
Alan