I've only got a water resources/environmental practice exam that has been passed around a lot. There is a decent amount of rudimentary soil mechanics and foundations, that I actually think is getting removed for that specific exam in the new one. The new structure means it might be a choice of piecemealing old content based on the NCEES topics list, or buying brand new materials.
I'll probably be sitting the exam a little under one year from now, so I'm planning on doing the former until early next year, then hopefully my employer will buy some newer materials, or handle a bit of the cost, or maybe a review course at a local uni.