Soft list of users of a role alphabetically with heading

Hi Guys,
I need to sort users of certain role and alphabetically with heading like this way.

A:
– Abraham
– Abby
– Adam
B:
– Ben
– Bob
– Billy

Actually, I have 2 codes, one display users alphabetically with the heading (it works but it shows all users), and another display them by role and alphabetically BUT NO HEADING.

Here the code 1 ( no role selected) :

<?php
    $qry = "SELECT DISTINCT wp_users.user_login, wp_users.display_name,
            LEFT(UPPER(wp_users.display_name), 1) AS first_char
            FROM wp_users, wp_usermeta
            WHERE UPPER(wp_users.display_name) BETWEEN 'A' AND 'Z'
            OR wp_users.display_name BETWEEN '0' AND '9'
            AND wp_usermeta.meta_key = 'userphoto_approvalstatus'
            AND wp_usermeta.meta_value = '2'
            AND wp_usermeta.user_id = wp_users.ID
            ORDER BY wp_users.display_name ASC";
            $result = mysql_query($qry);
            $current_char = '';
            while ($row = mysql_fetch_assoc($result)) {
                if (!isset($current_char)) {
                        echo '<div class="spacer"></div><li class="letter"><div class="letter_head"><h2>'.$current_char.'</h2><a name="'.$current_char.'"></a></div>';
                        echo '<ul class="lisa">';
                } elseif ($row['first_char'] != $current_char) {
                        echo '</ul>';
                        $current_char = $row['first_char'];
                        echo '<div class="spacer"></div><li class="letter"><div class="letter_head"><h2>'.$current_char.'</h2><a name="'.$current_char.'"></a></div>';
                        echo '<ul class="list">';
                }

                echo '<li class="letters"><a href="';
                bloginfo('url');
                echo'/author/'.$row['user_login'].'">'.$row['display_name'].'</a></li>';
            }
    ?>

Here the code 2 (Display by role, no heading) :

<?php
    $blogusers = get_users('blog_id=1&orderby=nicename&role=Contributor');
    foreach ($blogusers as $user) {
        echo '<li class="letters"><a href="';
                bloginfo('url');
                echo'/author/'. $user->display_name .'">' . $user->display_name . '</a></li>';
    }
?>

So somehow, I need both codes to work together, the list I need must be alphabetically displayed of a certain role(Contributor) and with the headings.

I hope someone here can help me to resolve this, your support will be greatly appreciated.

Thanks guys.