Bob,
From a Honda dealer I ordered steering extension plate p/n 53234-ZW9-830, which was $22.30. Fits the BF8D/9.9D according to Honda's web site. You don't need anything else from Honda - I got sold mounting hardware which is unused. The ball stud supplied with the steering link has the same thread and either of two holes on the plate may be used, but I drilled and tapped a third closer to the pivot point of the motor since there is a short radius to the rudder post attachment.You can get away without any fabrication by putting a 5" long 1/2" bolt through the hole in the rudder post and using the hardware supplied with the link as posted here (link below). This was the basis for my project, and it looks like the MarineTech link as well.I tried the bolt but thought the fitting would spin, so I bent-up an aluminum plate to attach to the back of the rudder post, held in place by a U-bolt around the post. This is kept from turning by the head of a screw which fits into the rudder post hole. The ball-stud is then bolted to this plate (see photo, which really doesn't show it very well).This is a pretty easy job but it might be tough getting to the motor bracket bolts on the water (two existing bolts that hold the tiller on are removed to install the bracket).If you go with the zinc link you are spending less than $50 ($75 total for SS) and this is one of the best mods you can make to improve the steering. I have a lot more confidence when docking with this get-up.