Have a look at Oppo (low carb) or possibly Halo Top (lowish carb) - both use erythritol and stevia as sugar alternatives. but some flavours are more carby than others, and ingredients differ - some are closer to real ice cream (made with eggs, dairy) than others. Use your meter as your "suitability" guide.
It might be worth looking too at low carb or ketogenic ice cream recipes if you're willing to make your own.
Robbity