Try your local steel supplier they usually can sell you a 12' section for less than the other sources 4' section, I know I used to work for one, bonus is no shipping. If they don't carry them in stock they can usually have them within 3 days. Usually Stainless Rounds are sold in 145" lengths (approximately) and 1/8" was quoted to me by my local source (Pacific Steel, Pasco, WA) at about $3 per 12' and they will cut them to the length I require if needed. Unless you have a need for aluminum for some reason SS is much better.