Looking for a game developer to convert old source code to modern source code.

I have assets for a full game, but it was coded back in 2001-2004, and is using old C language, written poorly, and uses technologies (like online multiplayer) that are dated. I have the source code to the server and the editors (map editor, quest editor, etc.) but I do not have the source code to the game client. My goal would be to convert the current source code to be compiled in a more modern environment. I would also like to make a new front end client. When the project is finished my hope is that I would have a game in the same state as it is in now (but with modernized code) and the ability to edit and add more to the game in the future using the editors.