See if this works with your machine
The Baby Lock Bobbin Center Pin converts smaller 9.4 "L" sized bobbins to fit 11.5 "15J" size bobbin machines. Mostly used with prewound bobbins.
Part Number: BRO XF5048001
Alternative Part Numbers: XD0835051, XC8450051, XC8661251
Guaranteed to fit because it is a part.