This is really the wrong section for your question.
There are many sponsors on the site that carry some form of Exemestane.
RC and Pharma.
I rep for CEM Products and can vouch for their Liquid Stane because I have used it with the expected results.
I also rep for SFY and can vouch for the Pharma Cabaser. I've used it successfully as well.
As I said, there are many sponsors with Exemestane so the two I mentioned are not your only options.