A while back I placed binaries of SDL-2.546 (latest version) on my sisyphusion repo.

They're still there, so try (updated):

ppm install http://www.sisyphusion.tk/ppm/Class-Inspector.ppd --force
ppm install http://www.sisyphusion.tk/ppm/File-ShareDir.ppd --force
ppm install http://www.sisyphusion.tk/ppm/Capture-Tiny.ppd --force
ppm install http://www.sisyphusion.tk/ppm/Alien-SDL.ppd --force
ppm install http://www.sisyphusion.tk/ppm/SDL.ppd --force
[download]

If you strike problems with that, please let me know - and also provide the output of perl -V

Note that it will install a large number of DLL files (needed by SDL) into your perl/site/bin/SDL directory (creating the SDL directory in the process if it's not already there.)
That directory therefore needs to be in your PATH environment variable.

If you're running recent Strawberry Perl then I think that running cpan -i SDL should also work.

Cheers,
Rob