If you have already got a text file with a list of tunes, you could post the list, or just the tunes you have NOT found. Some Mudcatter may already have it or know where to find it.
It is always useful to have a text list (e.g. notepad on Windoze) so that you can cut&paste from it into a search engine (for this sort of stuff try Google) or the Mudcat Forum/Digitrad Search.
There are MIDI files collected together on the Mudcat - try this blickie to list them, Mudcat MIDIs you can then search within the page for a keyword from the title you are looking for.
Quack.
Geoff the Duck.
p.s. If you find any good ones we haven't already got, post a link to where you found them.