You can get a "7ft. Vinyl and Acrylic Coated Canvas Umbrella
LAPCO 5 1/2ft. Yellow Vinyl Umbrella" at:
http://joesboots.com/searchresult.aspx?CategoryID=30 I have been looking for a new Umbrella and stumbled across this one, seems to be a good price with the free shipping. I'm working on a Solar Power Plant just south of Las Vegas, NV. The temprature and cloudless skys are allready requiring some king of a sun blocking apperatice. I've been lucky so far I've been working mostly in the shade of the forty foot tall "Raw Water" tank. We should be getting thru with this project in the next 45 to 60 days.
Here is a webpage you can view the project at:
http://www.treehugger.com/files/2007/03/nevada_solar_on.php Jim