You can obtain an archive of /r/chapotraphouse here: https://the-eye.eu/redarcs/
Type in chapo, you'll find moretankiechapo there too. And countless others. The entirety of the top 20,000 subreddits was archived before they shut down the API and that API still allowed you to pull content from banned subs.
Posts and comments archive separately so you'll have to get them separately. There's probably some way to rebuild the entire thing using them as the basis of new databases but don't ask me how.