Photoshop :: Pixel Aspect Ratio Data In JPG Files

I came across something very weird and would like to know how to correct it.  There are a series of scanned Japanese manga that are JPG files, but for some reason have non-standard pixel aspect ratios stored.

I can open it in Photoshop, uncheck "pixel aspect ratio correction" in the view menu, and it looks like it should.  However, what I am curious is how to permanently change this data in the JPG without losing quality.
 
A friend of mine came up with a fix - open it in a hex editor and change the first 20 bytes to "FF D8 FF E0 00 10 4A 46 49 46 00 01 01 48 01 48 01 2C 00 00".  But any way to do this intelligently so I can batch-process the entire bunch of images.  There's a whole series of them that all have improper PAR data.
 
Here's a link to the file in question:

[URL].....
 
Note that the proper display is to set it to square pixels.  And if I recall correctly, that's the default for JPG - which means whoever made this image encoded some custom ones in it, and I want to remove them.
 
For what it's worth, I can open it in Photoshop, uncheck "pixel aspect ratio correction", then save it as PNG and the PNG file will be fine.  But that results in larger files, and again it's not very ideal for a large group of images.
 
Does Photoshop has the ability to batch-process JPEGs, just to REMOVE the PAR data (or reset it to square), rather than re-encode or re-save the image as another format?