From Home Depot, get a Shur-Line Easy-Reach 60" Adjustable Extension Pole (SKU: 206986). You'll need something that adapts the thread used on the paint pole to your camera.

I hacked two broken tripods for this project, plus a fully-functioning tripod as the main tripod base. Tripods differ in construction, so YMMV. Try unscrewing everything to remove the head, or the tube which holds the head. You may need to use a pipe cutter to cut the end of the central tube to free the tube which holds the head. I also removed the legs from the two tripods. If the tripod has a spreader, you can possible remove screws to free the legs, or if the legs are riveted to the spreader, you can crimp an end of a rivet with pliers, and then saw the crimped metal off with a metal hacksaw or mototool. Save the legs for later.

Alternately, if you don't already have a tripod to disassemble, you might consider another option for mounting your camera to the Shur-Line pole. Home Depot also sells a Project Select Adjustable Pro Yoke Roller Frame, which expands to hold rollers between 12" and 18". At about $20, this costs about as much as the Shur-Line Easy Reach pole. Many camera mounts use #¼-20 screws, and you could probably fit one into the long slots on the adjustable roller frame.

Since I already had a tripod or two to disassemble, I found that the cheapest way to mount a camera to the paint pole was to mate the round tube that attached the head to the tripod body to a round paint roller handle that had the proper threads to attach to the pole. Also from Home Depot, I used a Quali-Tech Mfg. 14" Roller Frame for 6" Mini Roller (SKU: 478331). This item is nice because the handle is round, which is rare. You can cut the handle off and insert the hacked tripod's central column pipe into it. I used a mototool with a sanding drum to slightly widen the inside of the roller handle, and tapped the pipe in with a mallet. On a drill press, I drilled through both, tapped, and added an eyebolt, nut, and an acorn nut with threadlocker inside.

Use ~2-3" hose clamps to attach a tripod leg or pole to the top of the Shur-Line pole for the counterweight.