Cecina ? where to find

Does anyone know where I can purchase Cecina?
I know it is available by the checkout counter @ Superlake but it is too expensive.
I'd like to get 1/4-1/2 kilo to have around for when I make a pot of beans or stew or need a high protein carnivorous snack....

gracias,
david

pd: For those who don't know, Cecina (hopefully I have spelled it correctly) is dried beef, similar to beef jerky but, in my opinion, more flavorful.

I make my own cecina,it's easy,ask the butcher to slice some lean beef very thin for cecina,season with salt,pepper,chile molido and maybe a little teriaki sauce,hang the strips on the rack in the oven put the oven temp as low as possible,prop the oven door open a little and wait 6 to 7 hours,it's way better than any jerky you'll find around here and much less expensive IMO.There's also machaca I like the Sinaloa brand,pretty good with scrambled eggs.
Chris