Hastings Irrigation Pipe Co
P.O.Box 728
Hastings, Nebraska 68902-0728
Phone: (402) 463-6633
Fax: (402) 463-4355
Web: http://www.hipco-ne.com/index.htm
These folks have several diameters and thicknesses of aluminum irrigation
tubing which is ideal for telescope making. They ship to people without
an account (ATMs) via COD. Call for sizes available and prices. Be sure
to ask them to wrap the tube for shipping, or they may just slap a label
on it and let the shipper bang it around on the way to you. Ask for the
total price including the wrapping and shipping so you won't by surprised
(like I was). The price I paid was lower than I've seen elsewhere, even
with the surprise packing and shipping charges.