glue it in? I guess you could try that. But I'll tell you right now, it won't last, prbly not worth the effort. My key has broken in the past, and I find that the easist and cheepest approach, is to order the case from ebay, average cost $ 5, and then replace the guts into the new one and then get it laser cut for $40 cash, and my local locksmith...
And then you basically got a brand new key.