Hello n4mwd,
if you're looking for an oem-tb you can also look in German-Bay. Maybe this one is for you
http://www.ebay.de/itm/Kawasaki-EX-2...item589381345c
You can search for: Ninja 250* einspr* (its called Einspritzanlage). I told Matt some of them but don't know if he bought them all.
I've been reading the comments here and I don't understand why Matt didn't send you a pm and met you anywhere in the middle (there are always ways do make a customer satisfied). But one unsatisfied customer can kill all of your reputation. But that's not up to me even when I don't understand the comments of setasai against you and its also not up to me to say what I think about this.
I wish you good luck and it would be a pleasure for me to help you if I can, so take a look in German-Bay there you can always find things like this.