hello

remember it is never too late to start if you do it with full dedication. i feel that cbse textbooks are enough for MHTcet if you have thorughly read them. avoid any new topics as they will create confusion.

for books you can consider 

MHT-CET Engineering Entrance Exam Author: Editorial Compilation
MHT-CET- (Cd Rom) Author: Upaveda Learning Solutions Pvt. Ltd.
MHT CET – Chemistry (Marvel) For XII Science Author: Mayur Mehta, Chitra Joshi, Rekha Diwekar
MHT CET – Physics (Marvel) for XII Science Author: Bapat
Physics(Volume I and II) by H.C. Verma
MHT CET – Mathematics (Marvel) For XII Science Author: Hemant G Ainapure.

hope it helps.