Recovaring 2 months back mails after deleting from trash

I need to recovar few emails which i had sent to myself from my gmail account only. they had attachments like photos and some documents and are really important. i have deleted them 2 months back. what i did was, i deleted them from my sent mails as they were in my inbox thinking they wont get deleted, but today when i was searching my inbox i didnt find them anywhere. is there a solution?? please hele...