It looks like your stove has the deep well burner, but all you would need to find is the insert for it.  They tended to become separated from stoves much like crisper drawers did from refrigerators.

I'll bet if you keep looking you can find something that will work unless you're determined to have it look 100% original, but even that's' possible. With the element in the down position you could take some measurements and perhaps find something new that would fit without looking funky. Even something with better construction, maybe stainless steel with a heavy bottom instead of just a stamped aluminum pot. I really like that fridge. The color is just great. 

The size and design of a given well and/or insert can vary based on which company manufactured the stove.  I don't think the insert diameter (as long as it wasn't too wide for the well) would matter as much as depth.  Inserts other than GE/Hotpoint might be shorter, taller, or otherwise ill-fitting, in which case they wouldn't look right on an otherwise beautiful stove.

If I were in your situation, I'd wait for just an insert to come along on ebay or other such site.  The seller's return policy for the item you linked to isn't very accommodating, so proceed with caution.