Oh! I love these! I'm potentially DIYing a brooch bouquet (and um, potentially buying a custom one with the brooches if buy if I can't figure it out) and this would be a great way to tie in jewelry for the mothers!
Walmart probably does have cheaper options than Michaels - unless you can wait for one those crazy coupon sales they do! Although, maybe you can find a local bride to help you split some of the costs - pliers, crimps, and wire at least?