This is the riser I talked about in a earlier post:

8"or 4" Riser Extension
Filmtools 8" Riser for 75mm Manftotto Tripods and Filmtools Camera Car Mounts
http://www.filmtools.com/filmtools-extension-riser-8-n1503b.html

I use these on my Miller carbon mono pod and stack them as needed.
the risers run around 40.00 for the 8"
I've seen nice cameras and lenses fall off the wood and PVC rigs The wood /PVC cracks and the cameras crash to the pavement or rocks.
I really like my cameras so I buy them nice strong mounts.
I use a Right stuff tilt head ($$$)on the top for a strong camera mount! I use them with a 5D,7D 60D and a full sized brodcast camera (30lb.) I'm 6'-6" and with a 8" on my monopod I can shoot over the crowds heads at red carpet events and not need a step stool.

I'm confused. . . do you want your monopod a 'little bit' taller, so you can stand comfortably when you're using it? Or, do you want to extend your cam toward the 'tree tops' to photograph the birds?

I've seen a photographer using a 'painter's pole' to extend his cam to about 10', to shoot over the crowd at a parade & street festival. He also had a remote control for his camera, and a tiny pocket-size TV for a view finder.

Good luck!!

I use a product from filmtools.com it's a mini hi hat it comes in @6in. and a 10in. You can stack them to get any hight you desire.
They are well made and can suport a heavy camera 20lb+
they have 3/8 stud and hole and consist of three small rods atached to a round plate on each end that is drilld for 3/8.
They are made to mount cameras on diffrent mounts you can get the ph# from the web site.
I don't know if it's on the site sos you woll have to talk to a sales rep. It is a Fillmtools brand.
Also Gitzo makes a tall mono-pod but the taller the the pod the smaller the diamiter for the last leg .

Dave.

Why not make your own out of PVC pipe? But make it fit the bottom, not the top. Use the smallest diameter pipe your monopod will fit in. Another trick that I have made for when I want my camera to go real high is a pool cleaner pole. (The pretty blue ones.) Simply cut the seperate sections to suit you, using the handle part on the ground, then place your center tripod pole in the open end. Drill a hole through both and put a nut and bolt or large pin in the side to hold it in place. I had to shoot a high school basketball game a few times. I put my camera on the pole then raised the camera over the back board pointing towards the player. Got some great shots that way. I used my long shutter cable to snap the shots. I think it was less than $20 for the whole thing. The poles come in different sizes also.

I am 6'5" tall, have one tripod that goes to 7' and one that goes to 9'. Only one 6' monopod and I don't even carry that for wildlife shooting. My first tripod was only a 5 footer, I learned real fast that you had to buy accessories that you could grow with and that lasted forever, both my tripods are over 30 years old now, and I bought the 7' one used.