To be honest, I think most of the modern Tu types use parts from the same sources as western models these days.
Could be true about their Sukhoi SSJ-100 but not those Tupolevs. With SSJ at least there is a long list of western parts suppliers who delivered whole subsystems. Tu-204 is still pretty much a completely domestic Russian project, it is enough to look at its clunky cockpit with poor displays and awkward knobs, etc. Some Tu-204 were supposed to be available with western engines but I think it was the limit of western involvement, the aircraft is a dud in the marketplace.