Here is the plastiline sculpture (mentioned here: #202) for "design #159" (which illustration #193 closely resembles), and below is some Photoshopping to figure out a base color for the final product.
Here is one of the new MACRODON figures I am working on, from the designs for #157. It will have movable appendages once cast in plastic (it was really freakin' hard to figure out!). Below you can see the joints and sockets in place, and the subtle texture I gave this MACRODON (I wasn't crazy about most of the texture studies I did for this figure, so I went with something simple for the time being).