VeloNews' 1st "Buyer's Guide", 2003, had an introductory article, "Five
legends remember their favorite bikes." The story of LeMond began with a
photograph of a young of LeMond, "LeMond with his first love: his yellow
Cinelli in 1976" was the caption. However, the headtube logo seen in the
photograph was not that of a Cinelli. Richie Sachs was the first to identif
it as a Della Santa logo. And subsequently I spoke to Roland and he
confirmed that the bike was his. So yes, he built bikes used by LeMond.
Don't know if used any in a Tour or if he built any under the LeMond brand.
Perhaps you can ask him via his contact info at http://www.dellasanta.com/
Angel Garcia Verona, Italy, riding to Lake Garda in the morning