here are some alum. pedals to whet your apetitie
by the way, these dudes paid like $300 for the RUF and Carnewal pedals.
p.s.
apparently you remove the rubber cover for the brake and clutch and you'll need extra shims/washers for the brake since the surface is rouned while the back of the aluminum pedal is flat. The ebay set comes with three wood screws for screwing the dead pedal over the existing dead pedal cover. There are 9 screws and bolts for the other three pedals. You should tighten the pedals by turning from behind and hold the philips screw in place from the front so you don't scratch the pedal with the screwdriver. Also you'll need a good drill bit cuz the brake is
metal.
here's a great how-to link (spring loaded clamps!)
http://www.somniplex.com/gallery/1stmods