I can't buy t9 items

I can't buy t9 items

Hello, Sorry if this is difficult to understand as my language is not English.

I have a problem in my account and I don't know how to solve it, when I go with any of my pj to buy t9 items with Magistrix vesara, get other loose items and furious, but not the t9 set, does anyone know how to fix it?

That npc does not sell T9.

T9 is sold from vendors outside ToC 25

And also by some npcs in Dalaran (based on the type of armor).
example: this npc http://wotlk.cavernoftime.com/npc=35497 "Leather armor merchant" sells T9 and T10 for Druids and Rogues

It's true. I thank you.