Stock KTM parts from the dealer work fine, and I have seen some aftermarket stuff floating around this list too Mike.
I can tell ya from experience about the stock parts. You need the joint and 2 seals. The fische shows a combined part number, but in fact the seals have to be ordered under a separate part number. Mike's Cycle in Baton Rouge will have them in stock if you are looking for a supplier,
www.mikescyclektm.com.
All PDS bikes are the same, regardless of the engine size. The procedure is as follows: 1) put the bike up on a stand. 2) remove the lower shock bolt. 3) pull the seals out with a small screwdriver. 4) take a socket with an extension, a 15mm rings a bell but match one up against the new joint first to verify, and carefully drive it out from the outside of the bike in with the socket, extension, and a hammer.
Once the old one is out, clean the area well and lightly grease the ID. CAREFULLY line up the new one and drive it in with the socket and hammer until the spacing on each side is the same, then put in the seals. Reattach the shock and you are good to go.
In case you are wondering how long/how complicated this is, I saw Dick Burleson change one in about 4 minutes, just as described above.
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TexKDX