Dagnabit.. you're in a bad spot aren't you?
If you can't get your friend to fix it and you can't get the directions to where you can follow them.. then put a call into a couple of pards from your club and beg them for the name of their gunsmith.
If you shoot CAS long enough, you will need a gunsmith. Find your good local guy and make friends.. find out his favorite beer, meal or cigar.
Adios,