The best place to get the latest runtimes is from the SDL site itself..
http://www.libsdl.org/release/SDL-1.2.9-win32.zip
http://www.libsdl.org/projects/SDL_i....2.4-win32.zip
http://www.libsdl.org/projects/SDL_m....2.6-win32.zip
http://www.libsdl.org/projects/SDL_n....2.5-win32.zip
http://www.libsdl.org/projects/SDL_t....0.7-win32.zip

JEDI-SDL 1.0beta should be a lot more FreePascal friendly.