"aluminum is not repairable" Sure it is, I weld aluminum almost everyday. A few of the alloys do not weld well, but all of them can be welded. (alloys used in bike parts and frames) In this case you could weld the crack in the rim, then machine the weld so the tire will seat, and it won't catch the brake pads. But the aluminum to be repaired is bounded to the carbon fiber wheel, the heat will distroy the epoxy and the carbon fiber. So after fixing the rim the wheel would still be junk.
Even if you found someone who would weld it for you, do you really want to ride it?
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Bentbaggerlen
"When the spirits are low, when the day appears dark, when work becomes monotonous, when hope hardly seems worth having, just mount a bicycle and go out for a spin down the road, without thought on anything but the ride you are taking." - Arthur Conan Doyle