Anyone know where to find bass herald trumpets?

[BopEuph]

My only lead was a dead end.

These instruments are so difficult to find (and I don't have $10k to spend on a Kanstul), it's getting frustrating.

There's a handful of G basses I can find, but I'd really like a Bb/F bass herald.

Baltimore Brass has a Bb tenor, and they mentioned adding an F rotor to it, but I'd like to find one with the right size bore.

I'm organizing a herald trumpet quartet in Orlando, and locating a bass is very difficult.

[BopEuph]

So, on further inspection, it turns out that Bb heralds are such a new thing, with the genre of ensemble being so rare, that I'm not going to find that. Looks like I'm stuck with a G if I want to go used.

If anyone's willing to sell a bass herald in here, I'd be interested; but I think I found the one.