The stores that have bulk bins are supposed to (by law) be able to provide the nutritional info on the products... which usually means they must (and will) ask their distributor to provide it (or get it from the big big bag or box in the back room).

I had this same situation (different product) once and the Store Manager faxed the distributor and had an answer back a day later...

Give that a try with any mystery bulk product.

PPS: TVP counts vary by the manufacturer, so it might be best to go to the effort to get the info.