Kalista Spear rebind

So I just played a game as Sylas. we had a thresh disconnect at the 12~ minute mark and we managed to delay the game to ending until the 39 minute mark because of outplaying the enemies. However, we did have a Kalista that was binded to thresh, so she actually had no ultimate or passive.... can we have a way to Rebind the spear if there is a disconnect in the game? We were super close to winning the game.