Kirsten,
Probably somebody is going to have a go at me for saying this, but have you looked at getting something like the Akai EWI. It is a midi breath controller that can run sound samples from a laptop computer. It has an option for it to be used with trumpet fingering. So you can play pretty much any sound from a software sampler or synthesizer with it. It comes with a sound library from Garritan with a few usuable sounds. US $299 or less if you shop around. Then you need a PC and probably an amplifier of some kind…..
Just might broaden your options.
cheers Adam