Bosch KTS 300 9288 Hammer
 

This is not mine, but see someone in Portland has a Bosch Hammer for sale. He says he also has the older 9286 for sale, too. Link if you're interested:

http://portland.craigslist.org/clk/pts/3108792321.html

it's not a bad price.

You will also need to buy a Porsche lead and Porsche software module to use it on your 928. May need a new battery pack as well. We suppply all these items ....