I am fairly certain that
https://shop.sew-classic.com/Slide-P...-192-32569.htm will fit.
You can get a Singer 99 manual at
https://www.singer.com/support
I highly doubt that it would have originally come with a white motor.
ETA: thread about Sewmor machines
Sewmor collection
Janey - Neat people never make the exciting discoveries I do.
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Last edited by OurWorkbench; 01-05-2020 at 06:18 PM.