Search Sanyo UR18650ZT I believe, they are newer 4.3V cells, been asking similar questions before buying the 2600mAh, look around you will find it 
They are not bad but are 4.3V and won’t give you 2800mAh without going to 4.3V and maybe even then they might be slightly over rated.
I went with the older and proven UR18650FM.