For $49, you can obtain a 45 day subscription to ITIL Prime a Professional ITIL Foundation Exam Preparation service.
They claim very high exam scores for their members (greater than 83%) and have more than 380 sample questions.
I've known people that spend most of their study time focusing on sample exams. I can't vouch for the effectiveness of ITIL Prime, but it certainly looks like an an interesting option for sample-exam-junkies.
I'm still trying to do this without cost, so I'll hold off on this for now.