If you want a vise NOW…
A quick solution is plank clamped to a table or workmate. Workmate-vises need someone else to sit on it to stop it wobbling as you file. Any such sitter will want both reassurance and padding between them and the saw teeth.

A quick solution is plank clamped to a table or workmate. Workmate-vises need someone else to sit on it to stop it wobbling as you file. Any such sitter will want both reassurance and padding between them and the saw teeth.