The Rotary Dimmer Switch # 37215235 is the only one in that style we have, but we also carry some other options which you can see linked below.
The third wire on your current switch will be for the ground, and from my understanding JR Products is relying on the ground from the light to count as the ground in the second wire which is why they only have 2. If you aren't entirely comfortable with this method then here are the other options we carry:
- RV LED Light Side-Slide Dimmer Switch... view full answer...
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