What is the easiest/cheapest way to get the ninja’s hair?

I have both the old town and the character display and I would like to display one of them with the ninja’s hair so what would be the cheapest way of getting the ninja‘s hair? I already have Cole and Kai’s from the set and I technically have Zane, but it is his titanium version. I need the blonde version. What would be the cheapest way of getting blonde Zane hair and Lloyd’s hair. I don’t technically need Jay’s because he is in the pilot helmet. I preferably would like the version without the...