MISC screws\fasteners

I was looking around the inside of my car and noticed apparently the previous owner lost the screw\fasteners for the plastic door trim and some body pannels. Does anyone know if there the plastic fasteners or actual screws and where can i get the?

thanks

Time to get things started right…
Canadian Tire.

you can get similar fasteners from Partsource, but its not that big of a deal as long as the panels are not falling off the car, and it makes it easier if you need to get behind them.