How to re-link a linked image layer in Photoshop

I'm used to using the Links window in Illustrator and InDesign. In Photoshop (CS6), I have some linked images, added using File > Place, which look like this on the Layers window:

So far, so good.

I want to swap them for different images, and/or force them to update - but I can't find a straightforward way to do this.

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Just pasting the new image in is not ideal - they're part of a video animation updated in a different application, and creating new layers each time would create a lot of hassle. I'm looking to do the same sort of things you can do in Illustrator and InDesign with the Relink and Update... buttons.