No Bios update for P1.4

I got a X370 Tachi P1.4 Bios and FAQ even has this.

Since AMD AM4 is a new structure and we just found BIOS cannot be completely updated by our Instant Flash. Thus, for the old BIOS version released before 2017/03/07, there is no "Instant Flash??option under BIOS. To make sure BIOS update can be executed completely, please use DOS or Windows BIOS update methods to do update temporarily.
After updating to the following version, Instant Flash functions and options are supported under BIOS and it can be used for updating the newer BIOS file in the future.

HOWEVER the site no longer has the DOS or Windows version and I want to know.... WHY!
I spent all day looking and nothing so ticked off at ASRock at the moment.

P1.5 I can do instant flash that's great and all, but I need to get there first.

Thanks, however the file

[URL=http://www15.zippyshare.com/v/XF3Shp10/file.html]http://www15.zippyshare.com/v/XF3Shp10/file.html[/URL]

That I need is not there anymore.