Ikea sells an aluminum tambour that looks really nice. It also looks like your spice rack has a hickory tambour... could you get another and cut it to fit that opening?
The Internationals use sliders in overhead cabinets - you could do mirrored or black glass sliders in that space too. Matching is nice, but too much matchy-matchy?
As to the factory and doors, or whatever - call and ASK. All they can do is say no, and then you go looking for a local source.
Today is a gift, that's why they call it the present.