If you managed to see the obituary, you might be able to get the home address or business address. Someone is taking care of his assets. You can submit a letter showing the transaction and date, prove that payment has been done and request the coin to be sent to you. Its a longshot, you can also find out if an attorney is involved and send letter to him. Unfortunately there's some research on your part in order to gather the data. I went through this situation when my father passed away. He had some pending orders that needed to be mailed out, and others waiting on payment. Good luck.