Lehner 1950 end cap help!!!

[Hickoryhead]

I need an end cap for a Lehner 1950. The part the screws onto the motor and has screw holes for mounting it to the transmision plate. I think its called an end cap. Any ways I think the threads where stripped or almost gone before I bought it. Does any of you have one I can buy? Or does anyone know a fix I can do for it? 3\4 of the threads are gone on the cap. The threads on the inside of the motor are fine. I can't get it tight again. It was one heck of a jump though. I landed it but the threads just could not hold the weight of the motor.

Thanks!!!