Looking for a slim case for the K3 HE

Hi, I just finally got my K3 HE and am very happy with it. I want to take it to work and for that I would like a slim carrying case. I have the folio case for my old K3 which fits well, but the HE doesn't fit very well and thus I am looking for a new case. Does anyone that own the K3 HE have found a good case that fits? Thanks in advance!