Suggestions Where can I purchase random sign install accessories?

We're looking to purchase things like:

• Decorative caps that go on the top of signs across the full width (i.e. a 8' wide x 4' tall sign)
  
  
• An insert that would allow us to install said 8' x 4' sign attached to the middle of a 4"x4" instead of screwing into the front of the 4"x4" post

I'm guessing there are some good suppliers specifically for accessories like this...hoping somebody can point us in the right direction.


Thank you!

 

I started a marketing agency a few years ago and recently purchased a sign company we'd often collaborate with. So if it's a rookie question, that's a fair assessment...I'm not an industry veteran (but I'm pushing myself to learn quickly).

What I'm looking for is something like you see on the top of the sign in the attached picture.

Perhaps I'm overthinking this and that's just crown molding attached to the sign.


Helpful feedback about the channel cut into the 4x4 post. That wasn't exactly what I was thinking (I was thinking of something that attached to the post itself), but that would likely work well enough.

 

That's pretty much exactly what I was looking for...thank you!