I don't know what you consider reasonable, but when I went to Lazy Girl Designs to see what you were talking about, right there is a link to Atkinson Designs to buy the zipper pulls.
Also take a look at WAWAK Sewing Supplies, was once Atlantic Thread and Supply.
Last edited by elnan; 12-24-2015 at 05:13 PM.
Reason: another thought through my feeble brain