When you have opened the "Library"(Tab thing or what its actually called) in Logic (top left button next to info) theres a save button all the way down which allows you to safe the Instrument/VI with the currently selected/loaded instrument patch.
Those saves will then show up in the library of Logic under User-Presets (can also create Folders inside; the "patches" should be saved somewhere in -- User [/your name or what it's called]-- Music -- Audio Music Apps -- Patches -- Instrument; just create a new folder there and put the patches you want in there)
Should be then all showed by and in Logic
Did that for my most used HZS and Labs patches; though not all that would take to much time to do, but it gives a shortcut to load and open the instruments you often use out of those VIs quicker