Update -
After some deep Interweb searching. I found what to appears to a copy of the page from overclocking.guide on a Korean site, containing MSI NON-K bios for Z170 chipsets including the MSI Z170A Krait Gaming 3X I was looking for. Confirmed this BIOS is working and can overclock i5 Skylake to 4.4 Ghz
Korean Site: http://itcm.co.kr/my_review/720363
MSI NON-K Z170A Bios (Gaming, Pro, Krait, M series): https://mega.nz/#F!WMxXnCRY!hixqD6QOdsPBe7c10qUIPA
MSI Z170A Krait Gaming 3X Bios : https://mega.nz/#!yd4ywYYA!v3cPjm9jrOa-RXZaSOLqN_ydkHOZJywIhjddqFXmRRk