Actually, many VSVs can be found that work just fine once you figure out which nipple opens or closes when. Go to a salvage yard and grab a handful from a couple different cars and test them.There's a Mercedes VSV that'sa popular replacement for the Heater Control Valve's VSV as it's MUCH less expensive and works the same.
http://www.supras.com/06/techcenter/display.php?QID=67