Loop through MailPoet forms

Hello,

I need to show on my website a newsletter button for many countries, each one of them needs to be linked to a single newsletter form

My code right now looks like this:

    $args = array(
        'post_type' => 'countries',
        'posts_per_page' => -1,
        'order_by' => 'date',
        'order' => 'ASC',
        'post_status' => 'publish'
    );

    $numberOfCountries = wp_count_posts('countries') -> publish;

    $loop = new WP_Query($args);

    if ($loop->have_posts()) {
        while ($loop->have_posts()) : $loop->the_post();
            $form_widget = new Widget();
            for ($j = 1; $j <= $numberOfCountries; $j++) {
                echo $form_widget->widget(array('form' => $j, 'form_type' => 'php'));
            }

but it seems inefficient since it shows for each countries every form created. How can I link each country to a single form inside my loop? Can someone help me?

Thanks