said by capecoddah:
Bring the assembly to a Plumbing Supply that is a Kona Dealer. Most will deal with the General Public.
Odds are, the plastic inserts are standardized and will fit quite a few models.
Apparently there is no such thing as a "Kona Dealer"; they're a Chinese company that nobody around here has ever heard of. Doesn't surprise me that the builder of this house would've used cheap, crappy faucets. Everything else they used was crap...