The only way I can see suits getting repaired legally is if the suit has some sort of arc welder was on the suit. And even then it may ruin the actual model itself I'd really just recommend taking another suit entire to the number dude.

And what suit is that exactly demous? It would need to be something that can either take a beating and or could keep up with other suits. My Reborns Alvaron is a all purpose suit made with simplicity however it doesn't have any special firepower to speak of.