If anyone wants them before I recycle them (nod to phi11), I'll sell the front (21mm I believe) and rear sways (16mm I believe) and all 4 endlinks all for $50. Anyone with a 2009-2013 Forester XTs, might be a nice upgrade in front from your stock 19mm, just sayin'.
Someone that knows a lot more about than me should chime in, but I don't think they will fit on a 2010 WRX, since 2011 was the first year that the WRX got the wide body.