It still baffles me why Apple has not already released a wireless EXTENDED keyboard (includes the Numpad).
As for your question…. I've never seen one that includes a trackpad built-in. I have seen them sold with a detachable/separate trackpad. You will not see very many offerings on wireless keyboard that also includes a built-in trackpad and numpad. WHY?? Because that extra combination, I presume, might be too energy-draining and cumbersome for BlueTooth.
Try any of the big brands that have made OSX-compatible keyboards for years, like Logitech, Kensington, even Microsoft's keyboards and programmable mice are usually Mac-compatible.