Found the screws and spring at Ace. Only had to order the bearings from Amazon (623ZZ Deep Groove Ball Bearings).
Query, would this suit the Replicator 2X left side position? as replacement for original Makerbot filament feeder?
Is the any stl files to print this item from
This model? It says it was designed for the mk1 (http://www.thingiverse.com/thing:62510).
http://www.thingiverse.com/thing:222667 says it is for the 2x, so try that maybe?