I'm sorry, but right now it's only available in 16x16px.
If you change its dimensions from 16x16 → 12x120, I think it would end up looking pretty distorted given its height of 120, but I need more context...
What I could do to help you is try to create a 32x32px version that looks like this:
It would take me some time, since I'm working on other projects, but I'd definitely be willing to include it.
Let me know if you're interested. 🙂
Another faster option, would be to export the tiles at double the size (16px → 32px), but this would simply make the tile twice as large without changing its appearance.