Square I

Is there a download link for Square I? I can't find one on their website.

It is totally discontinued.

If you ever bought some version of Sonar, it's waiting in your account @ Cakewalk.

While discontinued as a product "on its own", it still comes bundled with Cakewalk's Sonar X3 artist, pro, and platinum (https://www.cakewalk.com/Products/SONAR/Versions)

Check out vst4free site Maybe there.

Not at VST4Free, but available for free in some other sites.
Great sounding, I've not seen in my Cakewalk Bandlab setup...