Do you know where I can find flannel dish towels? Preferably buffalo check.

As a friend once told me, "Look on Etsy but be prepared to lose a month of your life."

Etsy is a pretty solid spot for stuff like this
heres one from a google search http://www.pinterest.com/pin/45317539971323135/

Have you considered hitting up a thrift shop? You can get some old shirts and re-purpose them, cut them the size you want and just hem. Cheers!