It's still possible to get the KA Borg, even with the STF in its currently broken state. You need to have a team that will help you get the accolade, but once you've got that you can go to the taskforce and claim your new borg.
Also, they're tied to the accolade, so they're completely irreplaceable.
from what i understand, the error happens in space.
To get the accolade, all you need to do is run into this assimilation chamber and die.
From that accolade, you can get the BO at the task force. I would like to point out though, that the Reman BO seems better.
All you need to do to get to that chamber is that really hard engineering part.