I am new to this forum and thanks for the opportunity to partake.
I am in the process of restoring a 1904 ish Columbia AH machine but the tin section of the horn is badly rusted. I presume finding a competent tinsmith is my best option here as the brass bell seems ok. Another possibility is to make some sort of insert and try and patch things...? Does anyone have any thoughts about a positive way forward? The rest of the machine seems OK except for some oak laminate lifting on the plinth.
The other thing I need to consider is sourcing an elbow for the horn after it is restored. I imagine a reproduction elbow would be easiest but would value any thoughts as to where I could enquire. I have seen leather elbows on some early machines too.
Thanks for any thoughts on my project and I hope the pic of the horn comes through OK

Kind regards,
Stephen (Melbourne)