Wish that you would!
And while at it...why not make a mold that they can blow into to get the volume and shape exactly right...a two-part mold if you want to include the bell bow.
I guess the mold would need to be metal to handle the heat.
Chop chop! It WOULD look so cool. Dark-sounding though, I hear.
Hey...idea just popped!
Since glass makes a dark sounding horn, what about a flugelhorn with a glass bell, but a smaller bell throat to compensate for the already dark sound?