Joe,
That "freeze spray" (as we used to call it when I was working as an electronic technician) is a specialty item designed for electronic throubleshooting market. So unless you have some sort of electronic supply store around your area, I doubt you will find it locally.
But I'll tell you a secret if you promise to keep it to yourself!
Buy any of the "compressed air" or "dust-off" aerosol cans, and spray it while it is upside down (like they warn you *NOT* to do it on the label), you will have your freeze spray. And this stiff is readily available from many sources (office supply stores, Sam's Club, Costco, etc.)
I think it might even be the same liquefied gas used in both, freeze spray and in the dust-off. It is just that the freeze spray can has a siphon tube inside, so liquid comes out when sprayed, while the dust-off does not (so only the gas on top of the can comes out).
