Wow, you guys are good! As far as trying to address the material, I would say it would be similar to the hard rubbber used in making an electrical adapter that changes a cord from three prong to two (or vise versa).
That should address both flexibility and strength
The environment would be outdoor weatherable but no additional requirements in terms of excessive heat, or cold.
There are no moving parts and it has no expectations of life cycle - it will likely be lost beforew it becomes unuseable.
The shape would be cylindrical but not necessarily complex. I envision a few extensions off the body of the part that would be made of the same material but either attached during the molding or attached post-molding. I guess the complexity would be determined by how these extensions are attached.
Not a high degree of precision. The parts can have a wide tolerance and they are not required to be identical to each other run-to-run.
If the surface has a relatively smooth feel the part would not require any post painting or coating. Again, think in terms of the adapter.
I really appreciate the comments. Do you have any reccommended molders in the Atlanta area?