The ultimate solution would be to build it yourself!
Arduino has an excellent step by step guide on how to build a standalone Arduino, using a ATMega328, on a breadboard. Now everything is removable, not just the chip.
Note that there is one slight error in the guide, which I have highlighted here, Arduino Standalone - photo shows incorrect pin wired to MOSIArduino Standalone - photo shows incorrect pin wired to MOSI.
There is a video on how to achieve, more or less, the same thing, 1-Day Project: Build Your Own Arduino Uno for $5.