actually there are item it's not dropped by monster, it's become unknown. but you can try to change the question google or any search engine for specific information.
Fast way by using google:
e.g: temporal boots --> google will direct you to divine pride/RMS which only show the basic information about the item.
e.g: how to get temporal boots ---> google will try to direct you into Old Glast Heim Instance
there is another alternatif which more useful, make a friends even though you want to be independent. still make friends and ask them is the easier way. Currently me and my friends often stay in dewata, online between 16:00-22:00 GMT+7. You can ask anything with us.