Mothers medical autopsy

I normally don’t like to share my family business online but I’m asking friends and family for help. On Monday May 11, 2020 my Stepmother passed away. She is not just a step mom she took me in and raised me like I was here own son.. She treated me as if she gave birth to me. We really don’t know the cause of why she passed away. The only thing that they confirmed to us that she had a blood clot in her lungs.but they won’t go in any further as of what was the real cause unless we pay $7,000 so she can receive an autopsy. So I ask for your help to help me raise the money so my family and I can have that closure of what was the cause of her passing.. Thank you for your help and cooperation