Disable one in-app purchase as of a certain date

I have an Android app that has several features available as in-app purchases. We have published the app on both Google Play and the Amazon App Store. We need to stop offering one of the features as of a certain date. However, customers who have already purchased the feature should be able to use it past that date, even if they install the app on a new device. They should also still be able to purchase other features.

I was thinking that we could simply update our app so that the UI offered no option for purchasing the feature in question. However, that would not prevent a user with an older version of the app from purchasing the feature. So it seems like in addition to removing the feature purchase logic from the app (but not the feature itself), we need to do something to turn off the purchase at the store end. But whatever that something is, it must still allow the app to check whether the user had previously purchased the feature.

I've been unable to figure out from the Google Play or Amazon App Store documentation how to set this up. My understanding, from what I've read, is that removing the item (from either store) will cause checks for previous purchases to fail. Is it possible to do what I've described? We need solutions for both stores.

P.S. I did find one related question on SO: Are Google Play in-app purchases still valid if the app or the product is removed? However, it has no answer and also is a little too narrowly framed. (I'm not assuming that the product has to be removed and I also need to know about the Amazon store.)

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