There dosn't need to be one.

What needs to be is a company or companies thay make the hydrogen subsystems that a normal auto manufacturer installs into cars in the nomal production line.

A new company might be too lean. The existing car makers have billions of dollars to work with. A new company would be starting from scratch. If fuel cell cars become successful(which is still a big if) than the big auto makers will start making them and run the new guys out of business in a hurry. If fuel cells are not successful than the company will go bust.

Right now, the fuel cell technology is not competitive with other technologies and we don't know if it ever will be. You might think that the fuel cell is guaranteed to be a success because it uses hydrogen, but even if hydrogen becomes our fuel of choice (another big if) you can still run regular engines on it. A hybrid electric using a piston or turbine engine may wind up still being more cost effective than a fuel cell even when run on hydrogen. Plus, piston and turbine engines are more fuel flexible. They can run on alcohol, bio-diesel, or gasoline.

Doug.maulbetsch: Excellent Idea.
A diesel fuel powered fuel cell is being developed by Air Force Research Laboratories to produce electricity for military purposes. Such a fuel cell would allow almost any oil to be used to generate electricity, including vegetable oil.

With the arrival of the "Space Elevator" there likely will be ever increasing commercial enterprise in space. Could your fuel cell company focus upon supplying power for ion drive propulsion systems? I would think so.

For long term space-based factories, hydroponic gardens might provide more than food. Byproducts of fuel cells might be customized into compounds that can be recycled. Ion drives might be used to maintain the orbit and modify trajectories of space stations in orbit around the Earth, Moon, and Sun.

As for land-based electric vehicle propulsion, the fuel cells can generate sufficient energy to recharge batteries. The range of electric vehicles may significantly be increased by using fuel cells to augment power. I have yet to see the specs related to the power density of the diesel fuel cells.

Excellent Idea