Covered Buttons with Pin Backs

Many years ago my husband bought me a Bernina monogram sewing machine.  When he bought the machine I had young children and didn't have much of  chance to use it.  There is a steep learning curve for someone not familiar with sewing.  I am spatially challenged, and have never liked sewing so I'm not sure why he thought this was a good present.  It was a big surprise.   I have made my daughter lots of monogrammed pony tail holders.  (It works out to about $200 a holder)  I have also made several monogrammed pillows for her bed.  Now that she is older and not so interested in cute hair accessories I'd like to try and make the holders with the pin backs so we can attach them to flip flops or purses.  I can't seem to find the self covering buttons with pin back rather than the little loop.  Any ideas?