Changing 'Add to cart' button text and relink for some specific products

I want to make custom button for some products in place of add to cart button on shop page and set dynamic relinking to some other page. So I made a checkbox at the product page and if that checkbox is enabled then the custom button with different link will be visible to that product. here is the code for checkbox:

add_action( 'add_meta_boxes', 'wdm_add_meta_box' );
add_action( 'add_meta_boxes', 'wdm_add_customize_enable_metabox' );
function wdm_add_customize_enable_metabox() {
    add_meta_box(
        'Checkbox_metabox',
        'Check if you want to enable customization button',
        'wdm_enable_callback',
        'product',
        'normal',
        'high'
    );
}

function wdm_enable_callback( $product ) {
    $custom = get_post_custom( $product - ID );
    if( isset($custom[ "_wcm_custom_design_checkbox" ][0] ) ) {
        $meta_box_check = $custom[ "_wcm_custom_design_checkbox" ][0];
    }
    else {
        $meta_box_check = FALSE;
    }
    ?
    tr
        tdEnable design panel at frontend?/td
        tdinput type="checkbox" name="wcm_enable_checkbox" id="wcm_enable_checkbox" ?php if ( $meta_box_check == true ) { ? checked="checked"?php } ? //td
    /tr
    tr
    ?php
}

add_action( 'save_post', 'wdm_save_meta_check_box_data', 10,2 );
function wdm_save_meta_check_box_data( $post_id, $product ){
    if ( $product - post_type == 'product' ) {
        if ( isset($_POST["wcm_enable_checkbox"] )  $_POST["wcm_enable_checkbox"] ) {
            update_post_meta( $post_id, '_wcm_custom_design_checkbox', $_POST["wcm_enable_checkbox"] );
        }
        else {
            update_post_meta( $post_id, '_wcm_custom_design_checkbox', '');
        }
    }
}

The above code is working fine. I used this code into theme add_to_cart loop and here my only problem is how to get custom add_to_cart_url() for custom links and how to change the add_to_cart_text() text to whatever I want.

Here are the changes I made to add_to_cart.php:

global $product, $post;
$hasCustomization =  get_post_meta( $post - ID, '_wcm_custom_design_checkbox', true );

if ( $hasCustomization == 'on' ) {
    echo apply_filters(
        'woocommerce_loop_add_to_cart_link',
        sprintf(
            'a href="%s" rel="nofollow" data-product_id="%s" data-product_sku="%s" class="add_to_cart %s product_type_%s"%s/a',
            esc_url( $product - add_to_cart_url() ),//Here i want my own urls
            esc_attr( $product-id ),
            esc_attr( $product-get_sku() ),
            $product-is_purchasable() ? '' : '',//own css for custom text to show
            esc_attr( $product-product_type ),
            esc_html( $product-add_to_cart_text() )// Custom Text
        ),
        $product
    );
}

else{
    echo apply_filters(
        'woocommerce_loop_add_to_cart_link',
        sprintf(
            'a href="%s" rel="nofollow" data-product_id="%s" data-product_sku="%s" class="add_to_cart %s product_type_%s"%s/a',
            esc_url( $product - add_to_cart_url() ),
            esc_attr( $product - id ),
            esc_attr( $product - get_sku() ),
            $product - is_purchasable() ? 'add_to_cart_button' : '',
            esc_attr( $product - product_type ),
            esc_html( $product - add_to_cart_text() )
        ),
        $product
    );
}
?