Mike,
I don't have one for sale, but do have Don's suspension on my RAF. It has saved me from several bad landings, which, with an RAF gear, would have ended up in a rolled gyro.
The wider wheel base, along with the shocks, makes the machine more friendly landing, especially if you touch down with one main first, or a little harder than you should have.
There is a caveat to the Parham suspension, and Larry Boyer has also mentioned it. On takeoff, the cabin will tilt a little to one side or the other, as the blades load up, and the weight on the gear lessens. It feels really weird until you get used to it. It feels like you're about to roll over sideways, at least that what it used to feel like to me. I'm still aware of it happening, but don't get that pucker factor any more, as I know as soon as the wheels fully break ground, it'll stop.
I don't have time to resize my pictures yet, but will try to post some tonight, if no one else beats me to it.