I don't know of a smaller quartz cup, but the Lightning Pen by DT has the smallest ceramic cup I've come across. The cup is heated from the sides too. The hits can be a little hot for me, but it's a pretty well made device.
I've tried some of the lynx stuff. It's ok but I'd like to try something more powerful. I do use a lynx atomizer on a small mod box battery when I'm going portable but this is for the house.