I never had much trouble finding it in Stephenville, handy if you're running either 281 or 67. Used to make a turn in town where they'd stack it outside a convenience store. Easy to grab a case and go.
is a supply house in the D/FW area for the small stuff (in Garland, on Forest Lane; I635, NE of downtown Dallas). I don't know how much past a $1k I spent there on all sorts of little stuff for our Silver Streak. Old, with long-time employees. Well worth the drive to get a paper catalog and peruse the selections, upstairs and down.