Once someone explained what in the world you were talking about, my memory jogged and I remembered seeing these from a LONG time ago. I Googled "apron curvet" and got this site. Maybe it will help?
http://www.vendio.com/stores/Thingam...2/lid=24759840
I don't know how to make this a link for one to click on. I'm sure there is a way, but I'll have to look it up.
Update: It DOES make a link. Excellent!