B/J Partners?

[charming_nancy]

I've been thinking about the beginning of episode 4.1 when Justin says to Brian, "I thought we were partners?" when discussing Brian's dire financial situation after the Stockwell thing, and Brian answers, "We are" without hesitation. I'm wondering if there are any gapfillers where somewhere between "The Greatest Reunification Since Germany" in episode 3.9 and episode 4.1, Brian and Justin decide to label their relationship as a partnership.

Thanks in advance to any suggestions!

Update: One story recommendation in comments, but hoping for more!