How to glue field magnets back into e-starter housing

It´s not a KZ Problem but have to ask the Forum.
After 19 years of use my Hayabusa e-starter won´t turn the engine.
Have to get the starter out of the engine and realized 3 of 4 magnets are loose and block the starter fom turning the engine. What glue do i need to fix my starter? JB weld????

Maybe a motor-rebuild shop would know what to use. I suspect you want a lot of heat resistance.