Reviving this thread, as I've spent a little more time researching and studying options. While the Correct Track system seems like a good fit, I do not believe I have an axle alignment problem. The rig tracks well, tire wear is even (including on the old tires), and the measurements aren't suspect. However, it would appear that I can achieve approximately 1.5" of height adjustment by using the Equa-Flex Equalizers (LC279688). Here's the clicky:
Equa-FlexAn added benefit is the improved ride qualities it supposedly provides. The research I've done on user comments mostly confirms that it will improve ride and towing characteristics.
Now as a further explanation, I acknowledge that this product is for an axle rated higher than my axles. Also, I currently have an EQ-310 cast equalizer that, while larger than a standard equalizer, is a little shorter and about 1.5" more narrow than this version of the Equa-Flex. The Q&A section of eTrailer goes from "will work" to "won't work". General internet comments suggest that it "will work". I called Lippert and spoke to the technical service department and gave them all of my details, and they said that this product "will work" for my application, despite the fact that it is for higher-rated axles.
I'm going to pull the trigger on this later today unless I learn something to the contrary.