Well, Advanced Adapters is truly a wealth of information. I have one coming from the dealership. I found out that Tera-Flush sells their own. They wanted $42 for them (at a local 4X shop) as opposed to the $20 from the dealership.
My speedo will be close. According to the speedo gear calculators on line, I need a 41 tooth gear. The best that I can find that will work in my application is a 38 tooth gear. Close enough for government work...