You raise a valid point. While we don't have every part, we're constantly increasing the number of distributors and manufacturers who send us data. We have about 60 distributors on the site now which is about double what we had this time last year. We're always going to be getting better.

As for the part you mentioned, I didn't find a capacitor with those specs from TDK, but there are 12 alternatives here: http://bit.ly/hWnqhP

If you know of a supplier of the TDK part, let me know and I'll contact them.