A Group buy at KBDMania just concluded.
I think they will be offered again together with the 2nd round of the KMAC group buy after the new year.
My Korean sucks and Google translator is not helping, and this is the original group buy price for it
I think it says 37500 won for 1000 springs but I am just guessing
스프링 : 1000개 1셋트당 37500원 (신청수량제한없음)
2-1 45g 1000개 한셋트
2-2 55g 1000개 한셋트
2-3 62g 1000개 한셋트