Yeah, I ended up ordering wavy antique glass for my cabinet off Ebay from a seller that was removing glass from old Victorians. To have the original glass intact is great!!
The roll-up that would have gone in the groves would be just like what you see on a roll top desk. It shouldn't be difficult to get a replacement cut to size. Maybe someone here would know if that would be obtained from a cabinet maker?
The counter top is interesting. I hadn't heard of one with linoleum. I know they started with wood, like mine, then went to zinc, then to porcelain coated after finding out that zinc was unhealthy as a food prep surface. Can you see what it is made of by looking at the underside when it is in the pulled forward position?
I sure hope when your wife sees how desirable/collectible/valuable these old Hoosiers are, that it will be more than garage decor!