WTB 20" M16 A1 style pencil barrel

[f_m_d]

I'm looking for a 20" A1 style pencil barrel for a retro M16 looking buildup...

This is a budget build, so I'm looking for a low cost repro barrel not a vintage one...

Let me know what you have and let me know what you want, pictures preferred...

And last but not least I'm in IL so chances are it will need to be shipped...