If you're just looking for more rudiment-type patterns to practice, the 40 standard rudiments are only the beginning. There are literally thousands of potential new licks and patterns, many of which elaborate on the original 40. These are often referred to as 'Hybrid Rudiments', to emphasize that they combine and extend the traditional 40.
This list of 128 hybrid rudiments is superb. I have been working on memorizing all of them for several months now and find them highly educational as they not only make you think of new patterns but refine your mastery of old ones. Some of the rudiments listed there are duplicates of each other, but this barely matters as there are still at least 110 completely distinct patterns in the book.
Vic Firth's website has a list of around 50 more hybrid rudiments, many of which have videos and suggested warm ups to use before learning the full hybrid. You'll find many of these are duplicates of the those found in the previously mentioned book of 128, even bearing the exact same name. This alludes to the fact that there already is a sort of standardized list of hybrids that have become well known throughout the drumming world.
If by chance you happen to get through both of those lists, there's another compilation of 507 more rudiments online here. I haven't looked at this list as extensively as the first two, but it seems to have many good ideas in it as well.
Have fun! :D
Disclaimer: self answer!