Fetching Values using Options API within TinyMCE Popup

I am building a plugin, with a tinymce popup window to configure the shortcode. I need to be able to fetch a value from the ‘options’ table of the database which was created with the options api.

In PHP fetching the value would be done as following:

$options = get_option('wpep_options');
$var_i_need = $options['repo_url']

I need to assign $var_i_need as a javasrcript variable within the tinymce popup.

Any ideas?, Thanks