Used working electronic foot pedal.  Near new condition. "Speed controller FC-1902A"  wired to male electrical plug and FDM 11 E233504 female 3 hole terminal (scan 3). For up to 0.95 amp motors with similar 3 pin harness.  Should fit other models including:
Singer Machine Models:
118, 1007, 1012, 1014, 1105, 1107, 1116, 1120, 1130, 1409, 1507, 1525, 1725, 1732, 1748, 2250, 2259, 2263, 2273, 2277 Tradition, 2639, 2662, 2712, 2718, 2722, 2724, 2730, 2732, 2932, 3207, 3214, 3116, 3221 Simple, 3232 Simple, 3321, 3323, 3709, 3722, 3810, 3820, 3825, 3825, 3962, 4102, 4205, 4206, 4210, 4212, 4220, 4228, 4411 Heavy Duty, 4423, 50T8, 5511 Scholastic, 5532 Heavy Duty, 6239, 6510, 6550, 7312, 7322, 7350, 8132, 8280, 8510, 995D2, 996D2, E99670, Promise II (1512), Quantum Decor, 14T948DS, 14T957DC, 14T967DC, 14T968DC
Elna Machine Models:
1010, FA, F4, L2, L4, L4D, L4DE, L5, L5D, L40, PRO4DE, PRO5D, 604E, 614DE, 624DSE, 683, 686, 704DEX
And others, 2 pound shipping to lower 48.