I asked my dealer about the frame guards a while back and they were pretty ridiculous, somewhere around $500. The euro has dropped significantly since then though so might be worth checking on again.
I know I bought a set for my KLX450r (Lightspeed) and they were $100.
They do fit the KFX (Kawi Quad), too- but either way, not really a high-volume model, so from a pricing/ROI
I thought the price good. $500?