I had to buy a set of used throttle bodies from Ebay. That was the only way I could find any.
I looked for mine a couple of years ago... I tossed 'em.
I was hoping to avoid that, can't afford to make this a nearly $700 upgrade. I found them on Bike Bandit but am not sure about the screws, the diagram doesn't show them clearly enough so I can really be sure. Make have to just pull the trigger on that.
I paid $40 for the whole set shipping included. I see more right now for $41 to $47 with free shipping. The secondaries and screws are all the same