Take a look at the attached link. I buy things from them including prewound bobbins and have been very satisfied with them. Of course I live fairly close to them so I get the materials in a day or two.

Eric,
I buy mine at Terradon embroidery. You probably need a class 15 bobbin, and they carry these in white and in colors. The prices are very reasonable.

I get mine on ebay, great prices, and they work great.

Eric, I haven't bought any of these - because my machine will not allow me to use pre-wound - but look here.

I'm like Shirlener I do not use them but think U got good address to order them & look on ebay Eric *4U

i dont use them either i dont embroider enough to use them lol a little hummor in there

Hi Eric, I get my prewound bobbins at Ebay. Flower and XoXo

Eric, see you got your answer, just make sure that they are the prewound in a plastic cover as the other type seem to catch in the bobbin case.

I don't use them, but you can probably find them at allstitch.com they have good variety of embroidery supplies and good prices.

Sorry Eric, I don't use them. It seems to me to be a bit silly to buy prewound bobbins when I am capable of winding them myself. Also cheaper. I usually wind all my empty bobbins when I have a minute to spare and always have a stack of wound bobbins on hand. Ricky.

I also don't use prewound bobbins. I was told by my machine supplier NOT to use them. *4U

I love them ,I was worried at first but found they work out a lot cheaper and less hassell
they have so much more thread on them , less changes and work great .I buy them from local shop in lots of 20 but am going to look for bulk,

I'd like a mail order supplier of prewound bobbins too - I found some in a shop about 20 miles away but it is too far to travel just for them bearing in mind the price of fuel here - another price hike this weekend for us!.I don't know who the manufacturer was I've found they work better in my machine than Brother prewound. I don't have so much puckering, but I do think I may have tension problem with my machine. Jo

I have bought them from ebay but my machine doesn't like them