I will soon publish 5 Troubleshooting CCIE R&S Labs based on INE GNS3 Lab1 topology. I have made these labs with one of my friend when training for the CCIE R&S troubleshooting section. Each lab has 9 tickets and is a bit harder than the real lab exam.
As the topology is based on GNS3 with around 30 routers you will need a powerful machine to run GNS3 on it. An alternative will be to use Amazon Web services and build your own online server in order to run GNS3 on it. We have used a High-Memory Quadruple Extra Large Instance which is maybe a bit overkilled but it was working really well.
Thanks for reading,