Welcome! Lovely Howe A (2nd style) you have in your Avatar pic!
Your Florence is a left to right, mine is a right to left! (you can see the replacement slide I made for mine)
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(no spare parts, sorry), if there is anything I can help with please let me know.
You might consider making it into a handcrank machine.
Here is a Wheeler & Wilson Curved needle that is in a handcrank layout.
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