I have not been able to find it in the US, but it seems like a new card is out that is capable of blindscan, hopefully it shows up soon.
http://www.avermedia.com/cgi-bin/products_digitvtuner_dvbs pro.asp?show=1
http://www.avermedia.com/cgi-bin/products_digitvtuner_dvbs pro.asp?show=1