Im not sure about replacements for the Infernos. And to be honest i didn't try to look to much for mine. Sorry.
I do know they are plastic (polcarbonite?) though, but pretty decent ones.
They may be proprietary.
For the most part, tank cracking juices are rare in the grand scheme of things. Just those 3 particular flavors seem to be the worst.
But, keep in mind, not all juices are the same.
Pineapple may eat your tank alive from 1 vendor, and its fine from another.
I do know, for example, Volcanoes Pineapple flavors in their tanks is just fine. No issue. So these shouldn't be a issue for most tanks.
So, this was more of a heads up and check on a juice that may be questionable.
If it were me, I'd just pick up something like a Kanger Aero mini, Nautilus etc that has a glass tank. Use it for anything that may be problematic, or as your main.
Use your Volcano one for juices you know are fine. you'll just want one of the smaller ones or it'll be to big around and look odd on the Inferno.
I only say this because it may be easier than trying to track one down that'll fit. TBH, you'll likely like a 3rd party tank better anyway.
The only thing I can suggest, is send Volcano a email and ask them what would work. They are usually pretty good about responding within a day.