I have all the recordings and sheet music I listed. I have played some of the trumpet and harp pieces. None of the trumpet/harp/string pieces yet... But as most of the pieces are in composer handwriting, without trumpet part, I am still working on putting everything in the computer, to make it more legible. The downside to this ensemble (trumpet+harp) is that most pieces are very hard to find. The upside is that composers are very happy to give the pieces to you as their music isn't performed very often. Stan Friedman told me that he had never heard his Sonatine for trumpet and harp performed! Also, when you find someone who knows something, be sure to ask if they know anything else. And off course: you can transcribe anything you like yourself. Most piano-parts can be played on harp, you just have to be carefull if it's to chromatic.