One thing about the IL62 is that it can operate into airports with limited access and primitive runways, such as Khabarovsk, Vladivostok, Novosibirsk, Petropavlovsk-Kamchatka, etc. This is why it is currently used for flights from the US West Coast into those cities. The only likely candidate to replace the IL62 for Aeroflot is the TU204, in a longer-range version, as most of the airports I listed, as well as many others throughout Russia, cannot accommodate widebody aircraft.
All IL62s, as well as other Ilyushin aircraft, are produced at the Ilyushin Design Bureau Production Amalgamation located in Kazan', Tartarstan. The aircraft were manufactured largely using parts made at a factory near Tashkent, Uzbekistan. I am unsure whether this production continues. Kazan' is the site of construction and flight testing.
Several former Aeroflot IL62Ms purchased by the now defunct OrientAvia were refitted with new cabin interiors and newer engine nacelle fittings/shells to reduce noise. This occurred in 1994-95. The aircraft were either parked or returned to Aeroflot as of late 1998. These IL62Ms will likely remain in service longer due to the extensive overhaul and rebuild they received.