Sure seems like there will be a shortage in the future. There's a shortage already!
I'm telling ya guys, the combo of a coated piston on a nikasil bore wears alot longer than non.
my YZ125 was wide open almost every day for 2 years without any noticeable wear on the bore. The vertex piston was the only piston I ever put in it, and the rings were changed once just because I wanted to. I wish vertex made a piston for us.