Unfortunately I have never seen a sasami wig..BUT I 
have an idea if h hasnt already thought of 
it...tell him to buy a long blue hair wig...put the 
hair into pigtails..but honestly that is the only 
thing I can think of...or you could go to the above 
website and have him ask on that forum which is for 
fanatic cosplay people...maybe they will know where 
to go ^_^x