Call Firm Feel and see what he can do; however, I'm not sure how this would adapt to the Borgeson box. You may have to make up your own.
I have the firm feel sector shaft support with a Borgeson box, works fine. My K-frame has all the gaps around the box mount filled with plates and welded.
I like that setup, but how much does that bearing sit below the K-member.
Could you take a board to show against the K-member extending to the bottom of that bearing assy. like this:
