It's driving me crazy that I have a Fort & Brave Max but neither is complete! I had been focusing on Fort but now it's time to try and complete my Brave Max. Like the title says I need both "Cerebros, and Emissary". I could use a set of the side canons too. Let me know what you got. I'm open to trades.
Did you try transrepro? I think he makes Brave and Fortress parts. They're recasts, but the quality is pretty darned good. Also, there is suppose to be a G1 KO Fortress Max (Chinese high quality KO) by the end of the year. If it gets released, you'll be able to get a For Max for cheap (Compared to the going rate on eBay). Hope this helps.