They don't make replacement parts - EOTech Vudu 1-6x24mm Rifle Scope, 30mm Tube, First Focal Plane

I was pretty happy with the scope up ontill now when i lost the screw in cap that holds the windedge dial in(fell of when i was shooting in tall grass) I called eotech to try to get a new one. I was Informed they don't manufacture replacement parts for the vudu line. Im guessing best practice would be to stay away from that line or only shoot in a very controled enviroment.