CALLING ALL CHAGAN"S!!
Perhaps our friend can help shed some light on this.
In my area Martin's is a major brand.
is in Memphis.
I can't believe you are unable to find this in the heart of the BBQ belt.
Call local restaurants and caterers. Find out if they have any sources.
Contact commercial bakeries. Many have thrift store and you can get 'em cheap.
If potato rolls can't be located, Chagan may never be able to visit Memphis!
A google search revealed several sources along with a slew of recipies. Baking your own white bread ain't that hard.
If all else fails MOVE. (Oh, yeah. Fill up every thing you own with Memphis ribs. You know... just enough for the trip.)