Hi, Here is one source for 6063 aluminum 1/2" od 1/16" wall aluminum tubing that I used for my Moxon 6m antenna: http://stores.ebay.com/TRINITY-METAL-SALES he will cut the tubing the way you like it +/- 1/8" he has 48' total of 6063 on special, in 6' lengths for under $ 26 plus postage. He ships it priority mail. 73 james