ActiveState tries to provide a pre-built Net::SSH2, but that automated build fails because there is no prebuilt libssh2 available. If all else fails, maybe you can ask the maintainers of Strawberry Perl how they build their Net::SSH2 and libssh2.

I've also used a pipe to plink.exe to fetch output from a remote machine, but that means you'll be fighting quoting across shell commands, which rarely is fun.