Does any one know the best way to move villagers over 100s of rocky terrain? I would really like the help/

SO BASICALLY, ME AND MY FRIEND GET A VILLAGER IN MINECRAFT AND IT WAS VERY HARD, WE WANTED MENDING, I THOUGHT I COULD MAKE SOME EMERALDS BY TRADING PAPER FROM THE SUGARCANE FARM FOR THE MENDING BOOK AND I REALIZED IT LOCKS THE DEALS AFTERWORD. ME