Years ago, John Baker sold a small machined widget that had (I believe) connected to a small chain that you could place in the opening to keep the door from closing.
As a carpenter, I cut a piece of 1" by 1" and kept if just inside the door for just that purpose.


98 Gen 2.5
05 Pontiac GTO
91 Corvette ZR-1
2011 Kia Sorento (wifey mobile)
Clarkdale, AZ