Jason - Yeah found those too, but they seem very expensive for what you get. See below.
Stuckpixel - I won't be using it all that often, for the occasional racing game like SpyHunter, APB, Lucky7, OffRoad, RoadBlaster, PolePosition, etc - that why I like the USB option, or modding an old PS2/PSone or guitar foot pedal unit that I can pull out when I feel like satisfying a craving. I considered building a sit down, but space is a premium - so I'm sticking with a stand-up.
Thing is I don't know enough about racing games to decide if the foot pedal should be a simple switch-type or a potentiometer or am I better off with one or 2 pedals. I had hoped the wiki would give me some idea (like it did for decision for the TurboTwist2 HighLow), but I was out of luck. I'm hoping a racing aficionado on the forum can give me some insight - even if it's just a list of racing games with their control types.
BEFORE I forget - there will be no dedicated shifter - I plan to remap the Player 2 Joystick as a shifter if needed.
Be seeing you,
WonderAlex