the Mathematics Syllabus found on the Board website has 2 or 3 from memory (yes, the syllabus does have Q's, often with fully worked solutions)
past 2U HSC and Trial papers (this area, although can technically be tested in MX1 under 'harder 2U', has not been in a while, and is almost exclusively found in 2U papers only)
Any good 2U textbook (fitzpatrick, cambridge, etc)