I’ve posted this in the STW thread but I though this might be of interest here, too.
If you want a ‘proper’ repair then you could get a new flange laser cut. Basically an annulus with two concentric rings of holes: one set for some m3 bolt to fix into the existing spoke holes and a new set of holes for the spokes. You’ll probably get away with same spokes and it would only cost £10-£20.
Something like this:
You might have to play with the outer hole positions a little to keep the same length spokes, and the inner pattern is just an approximation.