It appears to have been discontinued, but it's still a pretty great (and cheap) bag if you can find it.
Boss L2 Bag >
https://www.amazon.com/Boss-Carrying-Bag-GT-8-RC-300-Bag-L2/dp/B0010CXUHW
I think I paid $39.99 for it a couple years ago, and it's been just the right size for me and has held up well.
It fits, FM9, plus two 30' XLR cables, a 15' IEC power cable, two 15 foot guitar cables, one Line6 G10S wireless system, a legal pad, and a humongous DB Instruments 4E dual-axis expression pedal.
It was a cheap alternative to the studio slips. I maybe wouldn't recommend a bag if you're going to toss it in the back of a van with other gear piled on top of it. But I drive myself to most of my gigs, and it's been great.
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Does anyone use a dual-guitar gigbag? I have a pretty tough Gator double gigbag. I normally use it to carry two guitars. But since I can't even remember the las time I broke a string, I've debated whether I want to carry the FM9 in the second compartment. Anyone else try something similar? I'd better knock on wood before I jinx myself, lol.