Iowa railfan Kurt Michelson reported that the two "new" NB Southern units were ready to go on CN on February 10.
"Two ex-Cedar Rapids & Iowa City GP35-sumthings are in the CN Cedar Rapids yard this morning 02/10. Likely to head north to Manchester for destinations currently unknown at some point today"
Fellow Iowa railfan Bruce Tiemann deduced they should have been in Chicago by Sunday night.
Hopefully some CN watchers can trace those units from there. They may be traceable under CIC 110 and 112, or NBSR 110/112, or NBSR 2710 and 2712.