Haven’t seen any blue or black ion in a long time. Guess it was a limited run with no plans on making more.
I'm honestly not sure what the deal is with the special editions.
They pop up on their website in very limited quantities from time to time.
If you go right now and click under tool sets then master sets, they have a menu option for ion plated sets. Nothing shows up under there but they may have recently had some special edition master sets for sale or maybe they're planning to have them in stock on a more regular basis?
What I do know about Nepros stuff in general (I'm sure there are exceptions) is that it's not in continuous production. They will make them in batches. So if something is sold out for example, restocking could be months away depending on their production schedule. I'd guess for each run they will have a few that will get the special platings. The other possibility is that when they do their production runs, they likely ship out a lot of inventory to various retailers and distributors. There may be cases where unsold inventory makes its way back to Nepros and that's where you get the random sets for sale in tiny quantities.
I do hope that they fix their inventory issues though because as it stands a single YouTuber (AvE) seems to have gotten them enough publicity to increase their sales multiple times over (I forgot the exact number their rep mentioned in their email but it was pretty crazy). And for that matter they probably owe AvE a full master set at least.