Well, I got the same response about the swingarm I've gotten every time I've tried to deal with LSR in the past.
I got to talk to a girl who answered the phone. I could never get ahold of a tech or shop type person, and was told: "Hmmm...let me check and call you back...."
No one has ever called me back from LSR. EVER.
If you're not buying an off the shelf item, don't bother calling LSR.
Just my $.02
At JD Performance, we are considering building swingarms for the KFX, however, we are not sure as to how much demand for them is. So, if you are wanting one, please call Dave @ JD and let me know what length, and style of riding you do, so that I can complete my survey. There are a few questions I will need to ask you, so CALL 951-676-7957