Hi! First, it may be helpful if you are clear about the theoretical model of personality that you would like to investigate like the Big Five Personality Factor Model, Jungian Personality types, and etc. Second, you can start browsing past research that utilized such models of personality and look at the inventories that they used for measuring it. Please take note of the proponents of such personality tests. Third, you can email the proponents to request for a copy of the test that they have developed. Hope this answer helps.
I agree, first you need to decide what exactly within the personality domain you're after - there are plenty of databases on different topics. however, some of them might not be publicly available - but you can always try to contact the authors and make some kind of collaboration on it.
Thanks Jesus, I am basically concentrating the theory of Rogers self actualization and want to see all personality scales in list that will give me a chance to decide which one I can go to read, meaning to say I can read studies using the obtained scales after knowing all. On the other hand, viewing all scales related my field give me a broad picture to go beyond their contributions, right.
Thanks Anna, agreed on that contacting authors is must.
good luck with your research! in case you're interested in studying time perspective - we've got Zimbardo's scale adapted now in more than 30 countries.