How does one buy the latest hardware release.

[webmasterpdx]

There are 3 hardware releases. The first release, the second and the third, which has the same number as the second, but has darker blue text and lighter number key background color. I am having trouble buying a calculator with the new text colors. In my local best buy store, the calculators are all with the paler colors. Since it has the same number as the previous release, I cannot specify which release to online retailers...so how does one purchase the latest release of calculator?