Scenario: I lost a shirt on my birthday and 6 months has gone and it is found now.
1. I have found the shirt now. The shirt has been missing ever since my birthday. ('has' is not possible here because the shirt has been found? Or is it possible? eg. I haven't seen you for so long. (you're seeing that person right now) )
2. I have found the shirt now. It was missing ever since my birthday. (Can I use past tense for 'since' ? Past/present perfect is not needed?)
3. I have found the shirt now. The shirt had been missing ever since my birthday. (Is this correct? Is it better to use #2 since past perfect is not necessary here?)
Thanks.