Something like HTTPS Everywhere for new Opera?

This self-post was originally posted to /r/operabrowser. See more things from Dan's Reddit account.

I’m looking for an extension that will automatically redirect-to-HTTPS for particular domains, e.g. to ensure that I’m using the secure version of Wikipedia, etc., whenever I go there. The HTTPS Everywhere plugin from the EFF does this for Firefox and Chrome; what can I do to make this work in Opera?