how/where to get the Aransu Reset item

[ElectroIIII]

today i wanted to do some raids before i do the weekly challenges to get some gold after upgrading my accessories 

 

so i started with SK and VT first

 

after i found a team to apply to and windstrided to the SK we all were ready and went inside the portal but my internet went off that moment and came back after a long while...like long enough so my team did the raid without me and when i came back to the game i found my self not in the party anymore checked the dungeon/Raid list Ctrl+J i found the SK was locked for me and can't go inside the portal only if i used the Aransu reset item to reset the Raid once again

 

now i don't know how to get this Aransu reset item and in the same time i dont want to ignor this raid cus this happened to me last week and i dont want to lose it twice...i find many ppl who WTS the aransu reset but it is so expensive for me and i want 5 of it to reset 

 

any ideas how to or where to get the Aransu reset ?

[Cor]

There is no actual source for them, they don't even sell them in the cash shop right now.