If you go with 1010 rail, get it from the manufacturer, or find a length of it on Amazon. Some rocketry retailers 3x or 4x the price of the rail, which is silly when the people who make them will ship in fiddling small amounts. You don't have to buy in bulk. IIRC, they sell it by the inch.
You can get a 6-8 foot rail for less than 30-40 bucks, possibly much less, but I haven't shopped their page in a while. Do a google search for "1010 extruded aluminum" and see what pops up, or add the word "rail" as well. In short, don't pay $80 for a launch rail, shop around.