Here's mine from last year:
The barrel is an E.R. Shaw with carbine gas, chrome-lined, 1/9 twist. I am planning to rebuild it soon with a 604 upper and partial fence lower receiver from Nodak Spud. Just waiting for the lower to come.
Do you mean the A1? They are the ones with the triangular hand guards. If so, here's one to start:
http://shop.ar15sport.ihoststores.com/productinfo_v3.aspx?productid=RETRO-M16A1XM
I've had my share of that mouse with a Gew 88 I rebuilt a few years ago. He was just not happy with a reproduction cleaning rod and wanted an original. Now, I'm dealing with his brother, the Retro Black Rifle Mouse.
I have a .314 reamer you can use. I will not be attending this party Saturday, as I will be going up to Northern VA. However, I can stop by on my way up that morning and leave the reamer with Tim. Do you need a barrel pin too? I have one in .315 as well.