https://www.amazon.com/Plano-Weather-Tactical-Case-36-Inch/dp/B00E221A88/ref=sr_1_4?ie=UTF8&qid=1546290589&sr=8-4&keywords=plano+weather+tactical+case
This is what I use. Its a little long but you can store the power supply, volume pedal and tuner, cables and all your other stuff as well.
The Firehawk FX fits perfect and way more protective than any of the "bag" cases, and less expensive too. Oh and waterproof for only 60 bucks on amazon. just pull out the foam bits till you get perfect fits for you gear. They make a longer one too you could probably fit two firehawks in.
Plus people will not mess with you carrying this around :)
Cheers!