I have a new Babylock and had the same problem. I need a lot of bobbins. There were some at the store where I bought the machine, but I spent so much on it, I didn't want to buy more stuff. Mistake. :roll:
The manual states nowhere what to use.
I emailed Babylock--not helpful. I tried ebay--emailed two sellers--both confidently told me something different. Bought 8 from the local sewing machine/vac place--didn't work--they wouldn't fit on the bobbin winder.. Seller of the machine told me what kind to get--but I couldn't find them anywhere. I ended up having her send me some--credit card via phone. I ordered 20--that ought to do it.