The pedal treads for the brake and clutch came from Snake bite in Queensland. I just machined the backs of them to mount them and make them pivot under foot. Having your legs out relatively straight puts the pedals on a awkward angle when you press them down so I made them pivot to keep them flat under the ball of your foot when you press them. I made springs to keep them against their stops so they don't rattle and move about.
The pivot bolt is machined to retain the spring in place.
Hope this gives you some ideas.
Cheers