:sl:
I was already familar with a slightly different version of this du'a which translates like this:
Oh Allah, I ask you for Your love, and the love of those who love You, and the love of every action that will bring me closer to Your love.
I like this hadeeth site:
www.sunnah.com, because it gives you the Arabic text as well, which I feel is very important, as well as it's chain of narration in most cases, reference in the Arabic book, and the English translation book, where possible. However, as yet, it is only for a limited range of hadeeth collections, so if it was in a collection not mentioned there, it wouldn't come up in the search results.
In the search bar on the homepage, I entered "your love" and it's the second result that comes up. If you know any Arabic words of the hadeeth, you can search in Arabic too.
Hope that helps a bit.