Here's what I got - I have no experience with either, but they come recommended:
Tom Haberman at Aquarius Sail; Wyoming,MN. (Town north of St. Paul on i35). Used to build Supercats, probably still builds an occasional ARC so is very familiar with cat structural issues. Did nice work on my H20 - bow tang pulling through the side of the hull.
I've had non-structural work done at White Bear Boat Works. I know they repaired a friends F18 infusion structural problem and did it well. They used to build scows so are familiar with sailing repairs.
Both places will get really busy soon - now that the snow is starting to melt.
That came from Dave Mortenson. I got another recommendation for White Bear Boat Works, but also a warning that they're expensive. You get what you pay for. Really good glass guys are artists.