I do Source Mapping but mostly for Portal and Portal 2. I'm the main mapper of Portal: Project-Beta, Blue Portals and I'm also a mapper for Portal: Alive and Kicking. I do mapping for other Source games such as Half-Life 2 also.
Some screens. Its canceled, but it does not mean it can not be a portfolio piece.
Seeing this makes me crap myself. Have you perchance tried porting maps into the first Portal?
Please, continue make Blue Portals series, I think this project will be exellent!