Pole or Tubing Sources

For plain AL tubing for MYOG pole, here are two sources:
http://www.onlinemetals.com/
http://texastowers.com/aluminum_.htm
One way to do it would be to have fixed length sections of the same diameter using a short piece of brass tubing to join them, with one section of smaller tubing telescoping. You have to be careful how you store a telescoping pole or a small dent and they're stuck together forever.

Maybe this? http://www.rei.com/product/628047?preferredSku=6280470011&cm_mmc=cse_froogle-_-datafeed-_-product-_-6280470011&mr:trackingCode=72734FFE-FB85-DE11-B7F3-0019B9C043EB&mr:referralID=NA
Also Google Eureka telescoping pole for very large ones . Quest fabrics for constructinfg an exact fit. For DIY cheapness cut up an aluminum tripod and merge it with a regular swedged sectional aluminum base.

Fibraplex poles are not thick enough.

That surprises me a bit — I know that Fibraplex has replacement poles for the Black Diamond mids. I know that is only about 5' high, but if they can do that I would think they may also be able to meet your need. If you have not asked them, perhaps you should?

–MV

I actually did call fibraplex and they said they could not recommend that pole for more than 5 feet. It is 3 small poles epoxied together to create strength. They said you would need perhaps 7 poles expoxied together to create the strength at a height of 6 or 7 feet which would be very pricey.