http://www.exchange-ukash.com/ (They have a quite good rate but only can change your psc to WMZ or WME or WMR!!!)
http://www.paysafecard2webmoney.com/paysafecard_en.html (They have a worse rate and they also can't change LR!!!)
http://www.platinum-exchange.com/ (I think you will find the best...