Located in the US. I purchased a 28 pin insertion tool but it turns out it was the 0.6 " variety for things like EPROMs. I need an insertion tool for the ATMEGA 328. Does anyone know of a source? I can't seem to find it in the usual component shops, Newark, Mouser, etc.
Do you mean a ZIF socket? If so, Sparkfun has a 28 pin ZIF socket with 0.300 pin spacing: https://www.sparkfun.com/products/9175
Note that the socket is labeled "TFXTDOL" which at a glance looks like "TEXTOOL".... but unfortunately it's not TEXTOOL but a cheap Chinese knockoff (you're not going to be able to buy a real TEXTOOL socket for $3.00)!
Don't worry though... it's built quite well and works just fine. I've got several of them.