I ordered 100 bobbins for my Juki 2010q off of Ebay. These were excellent. I have used them a while and have had absolutely no problems. With shipping the whole 100 cost me about $20.00. I love having boxes of bobbins wound and ready to go.
http://www.ebay.com/itm/100-Bobbins-...gAAOSwt6ZWWRp2