Looking forward to helping you out with this!

Not sure if it's something you've already considered or added (hard to tell by the pics) but I gave a photo a vintage effect for an ad I did yesterday, and found that the lens effect in photoshop has an option to correct the colour bleed.

Here's the original:



If you look at the following pic (which is obviously after the processing) you'll see that by applying this effect (which as far as I can tell is maybe achieved by splitting the pic into 4 colours, zooming them all to a slightly different degree and then overlaying them) and then I added a tiny bit of zoom blur.




This gives what you can see - the centre of the image is fine and in focus, but towards the edge the colours start to bleed and the image starts to become blurry. Then I applied a vignette around the edge...