Yup the universal charger I bought also has that setting. Just make sure to read the packaging on it but either of those places should have them. Just make sure to read the packaging and double check it’ll output that voltage and amperage.
If you’re in the us, Best Buy has a few different multivarrel options where you can also change the voltage from 3.3v to up to 12v depending on what voltage the lamp is. Best buy is not the only store, you can get them online as well. I just say best buy because I needed one for my li-ion charger.
Yup the universal charger I bought also has that setting. Just make sure to read the packaging on it but either of those places should have them. Just make sure to read the packaging and double check it’ll output that voltage and amperage.