Back to Morse!
You can try this simple Morse Code Practice Oscillator.
Morse Key from the Army surplus can be obtained from
Frontier Trading Co.
Complain is that they charge a lot for a key from the junk!
Collecting one as an antique piece may justify the investment!
Typical price varies from Rs.100 onwards.
Frontier Trading Company,
518, Lajpat Rai Market (Chandni Chowk),
Delhi-220006.
Phone No: 2962407