I'm not really sure if it should go in this thread, but weren't you looking for the trumpet ZUN uses in his songs, Drake?
It's in the Edirol SD-80 synthesizer as the "Romantic Trumpet" patch. I'm not sure if you guys had figured it out by now, but I found this out on another forum, and while I haven't been able to see for myself, the guy who posted it knows a lot about synthesizers so I imagine that's about right.