Alternative Triton 2 Coils?

Are there any alternative mouth to lung coils that can be used with the Triton 2? Just received mine but I am finding the 1.8 ohm not to my liking, I can't find a sweet spot with it only having a watt range between 10-13 watts.
So are there any other coils that will fit the Triton 2? No sub-ohm coils.

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