Gas can question for long term users

I use an old blitz 6 gallon diesel can. I need to upgrade, but i keep putting it off since it has worked so well for me and i dont normally carry it around. Its mostly used for my tractor, cleaning tools and getting rid of fire ants.

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Do any of you have any recommendations on mounts for Waivian brand steel cans? I am wanting to carry 1 or 2 additional on my trailer's fender and looking for something that will hold them secure.
I have the Waivian branded lockable mount in my truck bed and it may work but its kind of flimsy.

It’s flimsy without a can in it; but once your full can is loaded in, the holder is solid.
 
It’s flimsy without a can in it; but once your full can is loaded in, the holder is solid.

Mine is still flimsy when loaded. But mine is only secured by the bottom. Maybe if I could gusset the sides it would do better.