After an hour of searching, I found the manual. It doesn't mention the belt, however. It's manufactured by Sanshin (stamped on the underside). It was badged as a Sewmore 711 Sewing Machine, A Universal Deluxe ZigZag Sewing Machine, a Monmouth Sewing Machine and mine is a Lenco Sewing Machine. Tia's has the manual. Hopefully this will be searchable.
bkay