I was digging around and came accros this company Dome Incorporated. That make kits Geodesic Domes. Most of the kits are for large Domes, but the do make some 8' and 10' version in Steel and wood.
http://www.domeincorporated.com/geod...me-photos.html
http://www.domeincorporated.com/geod...Wood_Frame.jpg
http://www.domeincorporated.com/geod...s/wood_hub.jpg
The last link shows something similar to the Starplate discussed earlier, for the kit gazebo's.
All that reamins is to workout how best to canvas this. Ply sheets with some fiberglass finish or Alumnium sheets. Many options.
Regards
Fahim