^ I think I answered my own question. ^ I remembered I have two TA spindles (one too short, one too long), and when I compare them to the 125mm Stronglight spindle it appears the shoulders are spaced a little differently.
I almost popped for this http://www.ebay.com/itm/Vintage-Stro...p2047675.l2557 last night - the listing said 118, but the thing is stamped 120. One will come up eventually. It's the only thing keeping me from finishing this project a riding it.