Hi Darrell,
On AP's website, those adapters look like the 119FP and 119FSA
http://www.astro-physics.com/index.h...o/1100upgrades
I think the ADATRI is what Mark sent the pic of. That's what I've got bolted to the top (flat surface) of my pier. I got a mate to drill and tap a few holes - though it was a bit more complex as it needed to be raised to clear the bolts holding my top plate and so he designed a spacer ring that raises it all by an inch or so.
Paul