Where could you look things like that up before mobile phones - even if you had one and could get a signal inside a random building - could access the internet, and anyway however would you know where that place purchased its baked goods from? - assuming they are supposed to be baked, although the couple I have tasted, have tasted like they were coated in raw flour, which is one of the reasons I think they are foul.
Are catering packs of such things the same as what's available in supermarkets - nowt else much is, like they use v small paninis to make garlic bread in most restaurants. I did at least ask Pete to try and ring his eldest daughter, the classically trained chef, but of course since she always works in restaurant kitchens - no reply! So - you guess is what you do.