Are there other models of Seiko from which parts would interchange with model A904-5199?  I know the parts I need for repairs are discontinued from Seiko’s inventory.  I was thinking that I might find a repair watch of a model from which some parts might interchange.  I am in need of the buttons listed as “A”, “B”, “C”, and “D” in the owners manual.  I would need any other parts that might be under the buttons that might have been lost when the buttons were lost.  Any assistance would be greatly appreciated.  Thanks, 1038