AFAIK the RTL8192 drivers are still in the staging tree for the v3.0.3 Linux kernel used by TC 4.x (as they were for the v2.6.33.3 one used by TC 3.x). Therefore I seriously doubt that there will be an "official" kernel module extension for it, as staging drivers are not supported (see the various statements to this effect in the forum here).
As I've also got a system with a device from that "family" I just took the sources from the Realtek page and compiled it myself. Please search the forum (and maybe the wiki page) for more details about how to build your own kernel modules.