Ouch, bet son wasn't too popular.
Not aware that there is any other source for wings panels than factory. It might be possible to find some 2nd hand panels; for instance I know that RIchard Thorne used to have an old S1 that was gradually being cannibalised.
S3 wings won't be the same, but S2 might be, though no doubt someone else will post who has better knowledge than I.
Condolences to your friend, but at least his son didn't do himself any harm other than pride.
Cheers
