Instructional Techniques for the Flight Instructor by On-Track has a section at the back with common student faults listed for each exercise.
ONTRACK AVIATION LIMITED
If you want a freebie, try the Australian Flight Instructor Manual, which contains a list of common faults for each exercise. The syllabus is based around the old RAF syllabus.
http://www.casa.gov.au/aoc/training/guides/FIM.pdf
Regards,
ifitaint...