No clue, but i searched the net and found some links that may give you ideas:
You may want to make the trumpet out of gumpaste or cereal treats and then place it on a cake or something?
I hope this helps a little....
Thanks so much for your links...sorry I haven't replied sooner,
took my husband to the Heart Unit Friday with heart failure, so haven't
been on any sites as yet.
Not sure exactly what these people are looking for, whether it be a "loose"
trumpet on a cake or a cake in the shape of a trumpet.
They will let me know on Monday what their requirements are..