make your own telescoping mast as was suggested.
go to a local large hardware store and track down one of the guys working in 
the piping department.
He, or perhaps she, should be able to line you up with 3 10FT pieces of 
steel or heavy aluminum heavy wall pipe that will slide into each other.
then, you can use heavy duty pipe clamps, or drill holes through the ends 
you wish to slide together and set with an appropriately sized long bolt.
I've got several different chunks of this kind of piping I've used in the 
past for push ups or masts.
Use an eye bolt set into one of the pipes near the end so you can tighten 
the nut on the inside of the pipe, if you need to guy the mast.
You'll spend allot less than $119, or $89 or whatever you will find a 
commercially availible mast going for.
Is there a reason it has to be telescoping?
if there is no major factor for why it has to telescope, you can use pieces 
of the same outside diameter pipe and use end couplings to join them.
Chain link fence posts will work as well...they're generally only in 8FT 
sections though.
You can spend allot less if your willing to get a little creative and if you 
have the mechanical aptitude...that and an X Y L that is willing to drive 
you and traypse around hardware stores and such hi.

some of the best stuff for antenna support structors is becoming pretty 
difficult to locate...roof mount tripods, telescoping masts, crank up 
towers, and all that good stuff.
they're availible at a premium from ham stores, but the days when you could 
hit your local radio shack or CB store and get them for cheap are gone.
who needs a tv mast or a cb antenna mast when you can use your IPhone or 
other smart phone and have the world and tv at your finger tips.
that's why radio shack sells more sell phones and pc's now then actual 
"radio" equipment.
I would make a guess that almost everyone, including store employees don't 
even understand the term " radio shack" and what it means.
regards
Colin
----- Original Message ----- 
From: "Richard Fiorello" <[log in to unmask]>
To: <[log in to unmask]>
Sent: Tuesday, November 16, 2010 6:30 PM
Subject: mast


> Hi Tom and List;
> Many years ago I used a flag pol.  It was a bit heavy but worked great
> and was locally.  I had them weld some extra pipe to make it longer
> which added to the weight.
>
> -- 
> richard