mel, there is an IMC confuser book around which is pretty similar to the PPL confuser. Unfortunately I think it is now out of print and I believe the author (Nung Sornying) died a year or two back. I sold mine on eBay a year ago. I would recommend hunting around for one as I think it's a pretty helpful revision aid once you are familiar with the course material.
There is also an IMC confuser website (google to find it), but I think this is done by different people.
Good luck with the course and your preparation for the exam.