Did we ever get to the bottom of the OP's query?
AFAIK, no 727-100s were built with anything other than -9/-15/-17 engines, though a number (around 10?) were subsequently converted by Valsan/Rohr to "Super 27" configuration with the -217/-219 in No 1 and 3 positions, of which a handful are still flying.
I believe there may also still be some of the Dee Howard conversions 727-100 (3 x Tay) still flying.