Hi Tushar30,
I understand how frustrating all of this might be. There are alternatives to taking the Official CATs though - and there's a broader issue about not trying to 'cram' in too much work before Test Day that you should consider.
The most realistic CATs available are the 6 from GMAC, but the CATs from Kaplan,
MGMAT and Veritas are all 'close enough' to the real thing that they will provide you with a relatively realistic score assessment (assuming that you correctly take the CAT in a realistic fashion). As such, taking a CAT from any of those sources would be a reasonable alternative if you cannot get access to the Official CATs.
That having been said, the process of taking (and reviewing) a CAT requires a significant amount of energy and effort - and takes time to 'recover' from. This is one of the reasons why you typically should not take more than 1 CAT per week - and your last CAT should be taken about 1 week before Test Day. If you were to take multiple practice CATS in the last few days right before your Official GMAT, then there would be a reasonable chance that you might 'burn out' a bit on Test Day. "Cramming" rarely leads to great results on Exams such as the GMAT - so you could probably take one more CAT (as long as you did so at least 3 days before your Official Test Date) - but you would be better served by doing light study and review during the last few days and getting some extra rest (so that you can go into Test Day calm, clear-headed and ready to work).
GMAT assassins aren't born, they're made,
Rich