At the time when I did this experiment, I found the print canvas at my local art store. If you’re in the U.S., I think this store is equivalent to Michael’s. But I also found that Amazon carried it. An internet search showed me several results. I bet you’ll be able to find a reputable online outlet selling it. In fact, for what I can tell, you’ll find way more options of the product online.

Good luck with your project!

Is there a process or software that can help me achieve that?

For a Contact transfer, you make a color photocopy of the original image. Then you apply contact paper over it (sticky side of contact facing right side of photocopy). You burnish it very well, and then soak it in warm water for a few minutes. After say 5 minutes, you can start peeling and rubbing the paper off the contact. This step takes a while. You take it as far as you can attempting to remove the “white” without scratching the image. Keep it wet to easy the removal of the paper.

This is where I stopped. I decided that mounting the contact transparency over canvas would look weird. The contact transfer looks plastic, and I thought would look better mounted on a more consistent / solid medium (e.g. wood, foam board, etc).