Outdoor Sign Frame/System?

[Bigdawg]

I've seen this before... but have no idea where. Is there a sign system or frame similiar to this picture? Or do we just create it ourselves? We can... but would be so much easier if those posts were already out there somewhere...

Thanks!

 

[iegrafixs]

http://www.signcomp.com/digital-library.php?mtype=pics