Filter/hook for changing prices

Hello and thank you for this useful plugin.

I have the following scenario:

For some countries, a second price for B2B cases was needed.
A B2B customer user role is created for B2B changes throughout the eshop

However in the pricing zone of Price Based on Country you cannot create a zone with countries already used which makes sense.

Thus, I added the B2B cases as extra countries, i.e.

add_filter( 'woocommerce_countries',  'add_b2b_countries' );
function add_b2b_countries( $countries ) {
    $new_countries = array(
        'IT_B2B'  => __( 'Italy - B2B', 'woocommerce' ),
        // .....
    );

    return array_merge( $countries, $new_countries );
}

Obviously these countries do not have any geolocation.

Is there any filter/hook where one could change the country before the price is selected? Or just change the price?
So that I could simply check something like:

if ( wc_current_user_has_role( 'b2b_customer' ) ) {
    // select a different pricing zone
    //  or or something similar
}

Thank you in advance!