WTB: Stihl cultivator / tiller attachment (Goleta - Santa Barbara)

I'm looking for a cultivator / tiller attachment for the line of Stihl string trimmers and Kombi units, in good mechanical condition.
I only need the gearbox and tines but the Kombi attachment which is that plus a half straight shaft would be OK too.
If you have one you'd sell, please send a description with asking price and location.
A couple of photos would be useful.
Thanks.