I am going for that Retro shifter peg you mentioned. And for a brake pedal pad I'm going with this one. It slips over the tang. Once I drill a hole I'll be able to screw it on from the back. I think it will work (it's the smaller one of the two)!
Here's the installation instructions.
http://www.kuryakyn.com/documents/installation/7534-21HD-1209.pdf 
