I'm late to this party, but the good thing is I managed to read all about your Darien Gap crossing on the same day as opposed to having to wait for the updates
I'm sure everything will work out with your bike. Colombians are experts at repairing stuff with minimal resources. I'm sure you will find a set of forks that fits your bike without too much hassle once you get to Medellin.
There is some Sherpa-repair-money headed your way, save some for a Tres Cordilleras at Al's Place!