I'm talking about the S size (11" x 14") which I assume is the small, single unit. Epicurean charges $34 for that size + a $25 custom fee per board. That's where my total $ came from. I however am going to use my own vendor and we will use 1/4" material.
Keep in mind that Richlite is also a countertop material in addition to being a cutting board material so there's really no harm in making it an IGT insert. I hear what you're saying and I agree it's good to have individual cutting boards in addition to an insert but in my mind you can't have too many cutting surfaces. We'll see how it goes. I have past profession experience in working in restaurant kitchens and I have been doing product design and development professionally for the past 14 years so I'm sure that between the two I can figure out what works best for me.
I just got my IGT table last year so I'm very much in the process of tuning my layout. I have a 20" Partner Stove that I'm also trying to integrate into the table as well. It's a little awkward with the non-removable windscreen so that's another problem to solve as well.