Doritos Sour Cream & Onion was first introduced during the late 1970s and had a brief run through the early 1980s. Frito Lay brought it back around this time last year (along with Doritos Salsa Rio) and are offering it again this year.
Doritos Jumpin' Jack were introduced in 1990 and I remember them as being very similar to Doritos Ranch.
If you're looking to try either of these classic flavor again (or for the first time), you can try your luck with Frito Lay's product locator to find the nearest store that stocks them.
Both flavors are only hanging around through February.
