There will be a Ori-Shop introduced which contains every Raid weapon up until Vlad. So if you are missing a copy to MLB for example, you can get the last one there for 2 Ori. It pretty much depends then on the weapon and if you can afford using Ori like that.
Correction: I for some reason had in mind that the Ori shop was coming alongside Vlad, but this is not true. It is a month later (dont know why I had it in mind. Maybe because Vlads weapon is the last one in it, I dont know. Sorry on that part.)