Welcome back, unfortunately there's no red morphs for the checkered garter, as you said theres granite, pastel, super pastels and albinos around, but that's it. For such a common garter they don't have very many morphs. Still awesome snakes, even just their normal look is very visually appealing.

You should be able to fine plenty of normal checkereds in a few months from now, breeding season is about to start for a lot of keepers.