Here's a couple.
Samlex
https://samlexamerica.com/products/1000-watt-pure-sine-wave-inverter-ntx-1000-12/
https://www.donrowe.com/samlex-ntx-1000-12-1000w-pure-sine-inverter-p/ntx-1000-12.htm
Magnum
https://www.magnum-dimensions.com/product-inverter/1000w-12vdc-pure-sine-inverter-csw-series
https://www.amazon.com/Magnum-CSW1012-1000W-12VDC-Inverter/dp/B01D8SWE3G
- Jeff