I've got this big book with Chemistry IGCSE Paper 1 Exam Papers from June 1990 till June 2007.
I also have books with the exams from June 2000 till the very end for Chemistry, Biology (I'm missing the 2000 and 2001 exams for Paper 2 only. Sorry, mate) and Physics. if you're interested, send me a PM or post here and I'll send 'em to ya. Ya just need ta wait until 4/26/10, when I'll be free from my trial exams.