Can anyone suggest a cheaper alternative to the ZipWall poles? I have 14ft high ceilings and am planning to remove old plaster to expose some brick walls. I will need at least 4 poles. The ZipWall kit that contains two poles that extend up to 20ft sells for about $200. $400 for 4 telescoping aluminum poles seems a little pricey to me. Wanted to see if anyone out there might know of a cheaper alternative. Thanks!