MakerBot Replicator 2: Print your own objects at home - CSMonitor.com
BondTech Extruder Upgrade Kit for the MakerBot Replicator 2 - 3DJake UK
Since the Replicator 2 no longer has support, I decided to rebuild it using a Creality 4.2.7 silent board. Runs customized marlin 2.0.x, has more functions than before, including automatic bed leveling.
MakerBot Replicator 2 user manual (English - 60 pages)