My initial reaction is to say find a replacement. Given that these are typically aluminum (assuming that's the case here) they present some different challenges with regards to welding. I admit I've not tried laser welding aluminum yet though, so not sure how the formation of oxides come into play as they do with "regular" TIG welding...in that process the inert gas is there to prevent oxide formation as you are welding. Welding on thin materials is even tougher, but the laser does give you a lot of control...not sure.
Might be worth a try, but then you still end up with a repaired and presumably reprinted (or at least touched up) insert...I guess it depends on what the friend is really trying to achieve here...
Cheers, Al
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