An example of a workbook that is available at INE includes this one:
This of course is a workbook for v5 of the CCIE R&S exam, so it is not up to date. However, it may be helpful in dealing with some of the topics involved. Since @ReneMolenaar 's post in 2014 the site has changed substantially.
For the new CCIE it does seem that you need to purchase a whole course. The only other resources beyond INE that I could recommend are found at Cisco Press:
I hope this has been helpful!