looking for a particular brushed ESC...

[eovnu87435ds]

Hey, I'm looking into trying a fun little project, but in order to do so, I will need 2 jaguar (MDL-BDC) speed controllers from luminary micro. does anybody know where to find these other than digi-key? and preferably used? They were distributed to FIRST robotics teams starting this year, and I need them for their ability to directly connect a potentiometer and limit switches to it with no coding necessary, so i guess any ESC with that feature would work.