One item that seems very difficult to find is a tiny spray bottle.
Anyone know where one can find a spray bottle 1 OZ or smaller?.

Like this?

http://www.oakcourtcreations.com/productcart/pc/viewPrd.asp?idproduct=245

Go to any drugstore and buy cheap nose spray. Dump out the contents. You can remove the internal straw if you want it to spray upside down.

Yes, like that. I wonder where I can buy them since that site costs $10 to ship them.

I picked up some small spray bottles at WalMart that were 3 oz. bottles and replaced the bottle with a smaller one.

What do you want to put in it?

I found a 1/4 oz spray bottle of hand sanitizer at a drugstore. Used it, washed it, and filled it up with my favorite sunblock-insect spray.

I'd name what brand the sanitizer was but I ditched the label. I wanted to use the one made by Adventure Medical, but couldn't figure out how to refill it.