Help finding small trim piece
 

Beautiful day for a drive today. Got home and noticed a small trim piece missing on the passenger side between the top of the door and the 'bottom' of the covert top where it seats into the cabin. Do these have a tendency to come off easily? I looked at an exploded diagram and identified the part as #986 504 862 00. However I can't seem to find where to buy it. Open to guidance.

Thanks in advance

Https://www.gaudinporscheparts.com/

they have factory parts and great prices

Check www.partssociety.com they have used ones in several colors listed for sale.
Their web site is a bit frustrating to search thru. They are listed under "exterior components".