I am looking for a very small dual NOT gate IC with only 4 pins. I couldn't find any via google or various sources.. Do you know if they exist in such a small size? or is an 8 pin the smallest?
OnSemi has many good logic gates. NL27WZ04 should work for you if your supply voltage is 1.6-5 V.
If this one doesn't work, find another chip from the website.
Hope this helps,
Microwave123
P.S. you can use NAND or NOR gates as inverters if you have any spares from other parts.
It isn't possible. Even if the gate had an internal energy source to drive the outputs, it would need a ground pin as voltage reference. Are you yet using logic ICs?