Use WP_Query and meta_query with type numeric

Hi, I’m using WP_Query to query the WPDB with the meta_query attribute as follows:

$args = array(
	'nopaging' => true,
	'post_type' => 'my_post_type',
	'orderby' => 'title',
	'order' => 'ASC',
	'meta_query' => array(
		array(
			'key' => $meta_key,
			'value' => $meta_value,
			'compare' => $meta_compare,
			'type' => 'numeric'
		)
	)
);

My users are storing the meta_value in as a number in the format of 21,234 (with a comma). The type numeric does not work as it’s not registering as a number.

Does anyone know of any filters that I can use to filter that meta_value out so the query will run successfully?