Check out the vendor hobbyist classified section, find a member whose work appeals to you and fire off a message to them. I am sure many hobbyist here can Make you that brush.
Omega makes one that has a long handle. I believe it's the 10098.
Omega makes one that has a long handle. I believe it's the 10098.
see 2 photos above the 2nd to longest is the omega. But not long enough