Polypropylene clearomizer selection?

[Hinshirion]

Is there one at all? It seems there would be a killing to be made, if someone just manufactured replacement tubes for the Vivi Nova for instance? So far in my slight search, it seems like the only alternative I could find (without going the cartomizer tank route -- not interested) were the Smoktech clearomizers, however I am not a fan of the system with the wicks coming down from the separate top compartment. Have I just been too lazy in my search, or is there really no clearomizer alternatives that uses a material that can withstand the "tougher" juices?

I do have a metal replacement tube for my Mini Vivi Nova, however it does have a slight downside to it with not being able to tell how much juice is left in it.

 

[scalewiz]

It seems to me like the more resistant the plastic is to tough liquids, the softer the plastic naturally is. The polypropylene plastics would not hold threads very well, as in the vivi nova, which requires threads in the plastic to assemble. So to make it tough enough, a compromise must be made. It works OK with most tanks as they are simply press fit together. The toughest to juice I have seen is the Ultimate/Supreme clearomizers, but their juice capacity is the smallest.

 

[Hinshirion]

I see. I did see another one from Smoktech where they had metal threading inside the tube, however first impressions of this seemed very meh in general, plus the replacement heads were fairly expensive. Not sure how easy they would be to rebuild either. I guess my metal tanks will have to make do for now.