Over the last 4 years Mine's cracked and been repaired several times Shane. I think the best "fix" would be to replace the entire section, including the triangular wings and make a timber / ply / fibreglass replacememnt - all depending on preference.
Despite the fact the recess for the radio is insufficient for a decent modern head unit, you'd be better off making one to suit yourself anyway
I'm still thinking about some fab work in that area.

