Google exchange api not working anymore

The api handling Google exchange seems to have shutdown. The site, http://rate-exchange.appspot.com, is not available anymore. This is on from line 24 of commerce_multicurrency.google.inc

    $result = drupal_http_request('http://rate-exchange.appspot.com/currency?from=' . $currency_code . '&to=' . $target_currency_code);

Another one seems to be available - https://currency-api.appspot.com/ but would not fit into the current module logic without lots of modification.