My students have pulled a few of the motor controller wires loose a few times too many and the wires have come out of the blue plug. Of course NOBODY bothers to pick up the plug.
Are there any replacements for for these? The blue plug is the only part that needs replacing.
Yes, we have everything needed to repair VEX wires and connectors: Premium Rubber Bands, Size 64, 100 pack - Robosource.net
It sounds like you need the 2 pin housings. Unfortunately, the keyed type is VEX custom and you can’t get them anywhere else (keyed servo connectors are different than keyed vex connectors), but the non-keyed type is legal and otherwise identical.
I can’t think of a situation where the key actually makes a difference on the 2-wire connectors except for the 9V backup battery connector anyway.