Play along to Marcello's Concerto in C minor (Bach BWV974) 1. Andante e spiccato, for trumpet or oboe. Get the full mp3 accompaniment and sheet music for piccolo trumpet Bb, trumpet Eb, C (suitable for Oboe) from http://sellfy.com/RTmusic
Please note I also have a D minor version.
Notable trumpet solo performances of this are by Maurice Andre, Alison Balsom, Tine Thing Helseth, Sergei Nakariakov.