[VAL] Larger pop rivet source?

[Dave Lowrey <airstream@xxxxxxxxxx>]

I am insatlling a 2nd hand Zip Dee awning on the road side of my 
trailer. It's one of the "short", window sized awnings, about 14' long.

I am looking for a place to buy the larger sized pop rivets to attach 
the awning arm brackets to the trailer.

I found 3/8" diameter, 5mm long aluminum pop rivets at Lowes. There were 
perfect for installing the awning rail. However, I will need pop rivets 
a bit longer for the arms.

Any suggestions on where to find them?

Dave