Frankenbike, nice to see you on this site. I look forward to the arrival of the covers, and will put them on and photograph them as soon as time allows. Please let me know if there is anything in particular or a way that you would like them photo'd.
If anyone is looking for cool aftermarket covers, this is your guy. Frankenbike makes some neat finned and smooth covers in all kinds of colors and transparencies, and they fit great!
Eosmontana:
I got the seat padding from a motorcycle shop, but I know that you can purchase from many online companies like airtech. It is 1/2" medium density foam, and they make it in several thicknesses and densities.
Jens