When I studied for the DAT I found Barron's PAT to be much harder than either Kaplan or TopScore especially with the judging angle size section. I unfortunately gave away all my DAT study materials, however, the book is only $16 from B&N and $12 in Amazon.com and you could buy it used on Amazon.com as well. You may even find a copy in your local public library and make copies of the PAT section.
WARNING: The PAT section is the only section of value in Barron's How to Prepare for the Dental Admissions Test. So if you buy that book to study for the PAT disregard the rest of the book.