Add a drone clef for didgeridoo

I write notation for didgeridoo. Normally i'd use a "drone clef" which i've created for the instrument as well as the entire system i use. I was wondering if Noteflight would add my clef as an option for anyone trying to write for didgeridoo. The clef still uses 5 lines 4 spaces so all that would need to be added is the clef symbol. I've added a simple drawing of it for reference. and yes, The time signature is drawn horribly i know. Thanks for your time.