Seriously, nobody is using BCB 6 anymore. You will hardly find build files or libraries for this compiler, and not only for SFML. I suggest you to switch to a more appropriate (and free) compiler / IDE, like Code::Blocks with MinGW or Visual C++ 2008 Express.
Anyway, SFML won't provide build files for Borland compilers, sorry. Your only chance is that someone else does it and share it on the wiki.