Exercises to prepare C1 at EEOOII

This is a very interesting link to practise with the parts of the exam. I haven't checked all the models suggested but what it is  helpful is the fact that it's a summary of your level and it's divided in skills so you have several different samples of each skill.
This is the link: C1 exams
Maybe it's a repetition of what you already have but it's shorter, more clearly organised and faster to find or yo work with.
In the same site of Idiomium you have these links as well:

• Writing C1 and as a revision you could use this entry "tipos de writing"
• Listening C1 
• Reading C1
• Speaking C1 and also this link with advice for the oral exam
• CAE exam

Hope you'll find it helpful!