Removing running boards

I’m going to be removing the running boards on my 2017 Tacoma. When I installed them, I had to remove small plastic screw-caps where the bolts were to be inserted (to keep water, dirt, and other debris from getting inside the holes). Well... I’ve lost the caps. Anyone know where I could purchase these? Worse case scenario I could tape over them or something, but I’d prefer the caps.

Thanks!

 

Hardware store.

 

We’re the holes along the frame? If so those caps don’t accomplish much since the frame is not boxed.

 

The holes are on the backside of rocker panels.

 

Ok awesome! Thank you very much. I’m afraid if I allow water, salt, etc to get into the holes that it will begin to cause rusting issues