Does anyone have any pivot axles, or pivot bolts they would like to donate or sell?

I'm also looking for 13-14mm outside diameter aluminum tubing with 12.5 or 11mm inside diameter. I only need 2-3 inches.
I'm interested in any kind of 6-10mm aluminum or stainless tubes. Aluminum needs to be as close to 7005 type density if possible. A bearing will be seated inside, so the tube size would determine the bearings ultimately.