I would love a more officially supported option, but this is what I have as a temporary solution:

    /**
     * Get the cards available for the request.
     *
     * @param Request $request
     * @return array
     */
    public function cards(Request $request)
    {
        // Grab the resource UUID from the request
        preg_match(
            '/([a-fA-F0-9]{8}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{4}-[a-fA-F0-9]{12}){1}/',
            $request->path(),
            $matches
        );

        /** @var WebsiteModel $model */
        $model = $this->model()->newModelQuery()->findOrNew(reset($matches));

        return [
            (new WebsiteMetrics\Clicks($model))->onlyOnDetail(),
            (new WebsiteMetrics\PageViews($model))->onlyOnDetail(),
        ];
    }