Dupont in the USA manufactures the PEM material for hydrogen fuel cells -- it's called "Nafion", and sells for about $50 per square foot, with a minimum order of about 500 sq. ft. if I recall correctly. You may want to call them because it's been a while since I talked to them and with luck their prices have decreased. You can also buy small science kits from http://www.fuelcellstore.com. Recently they started selling 50 kW fuel cells, that's easily enough power to drive a motor bike or a 1- or 2-seat recumbant cycles. Price is negotiable.
How's this for a supermileage eco-friendly personal mobility device:
Um. Fuel cells are kindof expensive, and ethanol is a better fuel for fuel cells than hydrogen because of simpler fuel production and storage. That's why I gave up and went for Biomass Ethanol, Biomass Diesel, and Flexible Fuel Vehicles instead.
If you want to debate this I've done lots of research and have all kinds of ideas, just ask.
Space/Science » in reply to Hydrogen Fuel Cells
re: Ahem... tried this myself once