Post grad work permit, issued to passport expiry, renewal from outside canada

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My Post grad work permit was issued to passport expiry i.e. August 2010.
I am eligible for 3 yrs permit till June 2010.

I returned to India in July 2009 and i am still in India.

What are my options to renew my permit?
Do i have to reach Canada to renew it or i can apply from India and get it delivered to Canadian address?

If i reach Canada in 1st week of August and apply how long will it take?

Thanks in anticipation for advices