ScaredyCat,
I had my Sidi Vertabrae boots resoled , twice , no problem, they lasted 15 years / 200,000 miles ish . Had to get rid in the end because the gear lever bit wore through, but at that old/mileage I can't complain.
Great boots Sidi . But when I went to replace them for another Sidi , three/ four years ago ? , they had changed the last they are made on and now are a lot narrower. Even a size up was too narrow for me

I got Forma Adventures and loads of room for my flat feet.