my buddy Joe brought down a couple pies like that from KC... durn tastey they were...
When we lived in Austin, they had these little refridgerated trailers that people would pull into a parking lot and sell pizza fixin's out of...you just told 'em what you wanted and they put it in a sack...ingredients were in baggies and such. You got a crust, sauce and whatever fixin's and you paid for only what you got.
Don't know if they still have those things...