Check out Rock auto as well as euro parts , even Amazon....I've never had a belt or pulley break in all my time... So I think it works well in practice .... I suppose yours is a newer model ? 10/11/12?
Learn all you can about your van...every part has a life span being proactive and changing things out before they break can save you a ton of money..... Example: your pulley belt system .... 2 pulleys and the tensioner plus belt every year !