That is a cutie! Glad she was all cleaned up for you. 185 takes CLASS 66 bobbins.
http://www.sewingpartsonline.com/bob...2222-10pk.aspx
(not affiliated with them...never purchased from them...only posted because it lists all the models the Class 66 bobbins can be used on)
I see that Joann's sells the plastic bobbins - I would stay with metal ones - even if you have to order them online or through ebay.
I see people selling machines craigslist and they don't even wipe the dust and dirt off them. . . and then they want LOTS of money for them. Those are the ones I pass on .