ABS light on, no coms with diagnostics

[scottalej]

I put the car into the local garage as the ABS light is on but they've come back saying there's no communication with the diagnostics. They think it's a fauty ABS ECU. What are my options?
Has anyone tried this fix http://passat-b5.ru/index.php?option=co ... &Itemid=57" onclick="window.open(this.href);return false;
Or anyone used this ebay seller http://cgi.ebay.co.uk/VW-Volkswagen-Pas ... 5d25526f83" onclick="window.open(this.href);return false;
Thanks