Here's what i would do. (30 years building and repairing)

Cut the messed up hinges flush with the back of the stabilizer and flush with the front of the elevator. Leave the part that is in the wood alone.

Get some Robart Hinge points. The ones that are 1/8 inch dia. (they have several sizes)

Wiggle the wire joner out of the 2 elevator halves and throw it away.

Make a new joiner from the same size wire... but 1 1/2 inch wider between the legs that insert into the elevator halves.

Make a jig to hold a drill STRAIGHT when drilling the holes in the elevator and stabilizer. (just a couple pieces of wood... not really hard)

Drill new holes for the new joiner... 3/4 inch from the old holes. (obviously, further from center of the aircraft...)

Drill the elevator halves and stab for 3 hinge points on each side of the rudder.

wiggle the joiner wire in through the gap between rudder and fun (or back of fuselage... where it belongs)

coat the pin area of the hinge points with some Vaseline. (just the pin area.... )

put some 30 min epoxy in each drilled hole.

Stick in the hinge points and put it all together.

Wiggle the elevator up and down a few times to ensure the hinges are all straight. (they will self align a little)

Make sure the gap is down to 1/16 inch or less, and EVEN all the way across.

Leave the thing alone for about an hour or two.

should be good.

You can then do the tape/monokote gap sealing.