http://www.fanfiction.net/s/4107842/1/The_Lime_Green_Fluted_Bowl This is kind of more of a Don and Charlie mini-fic but it has a good Charlie and Colby ending.
I'll keep looking cos I'm sure there are a lot more on LJ but it was just easier for me to look on FF.
P.S. http://www.fanfiction.net/s/4160786/1/The_Connections_Series Here is paranoid_woman's "The Connection Series" in case you haven't read it cos it starts off with friendship then moves into romance. It is one of the best NUMB3RS/Charby story I have ever read, it was also the story that got me into fan fiction. She has created 2 more stories since she has finished it to add to the series. I highly recommend it for any Charlie/Colby fan.
no subject
http://www.fanfiction.net/s/3842156/1/Alone
It's post-janus list and more Colby centric... I don't know if it's exactly what you'll want.
http://www.fanfiction.net/s/3019767/1/Little_Brothers
This one is one of my favs, it's really cute and funny.
http://www.fanfiction.net/s/3230507/1/Unlikely_Friendship
http://www.fanfiction.net/s/4107842/1/The_Lime_Green_Fluted_Bowl
This is kind of more of a Don and Charlie mini-fic but it has a good Charlie and Colby ending.
I'll keep looking cos I'm sure there are a lot more on LJ but it was just easier for me to look on FF.
P.S.
http://www.fanfiction.net/s/4160786/1/The_Connections_Series
Here is paranoid_woman's "The Connection Series" in case you haven't read it cos it starts off with friendship then moves into romance. It is one of the best NUMB3RS/Charby story I have ever read, it was also the story that got me into fan fiction. She has created 2 more stories since she has finished it to add to the series. I highly recommend it for any Charlie/Colby fan.