This might seem overkill..
But here's what I did once..
I soldered an allen key into the stripped slot. It worked fine..
I was even able to melt the soldering stuff off the key, so I didnt even have to waste that..
You could do that, or instead of soldering, use some type of mad ass strong adhesive..
Contact cement or a strong epoxy should be up to the task!!
Hope the sun starts to shine on you soon!
