My mom had this gadget that she used to make flowers for crocheted afghans her...

...and my grandma made.? Anyone know what they are called and where to find them? I haven't seen them at a few places I've looked. They were round with pegs all around-2 rows of the pegs. They made a flower she then crocheted into an afghan. The outer pegs formed the outer layers of the flower and the inner ones the inner petals and the center. I'd love to find some and know how to use them to make an afghan like mom used to. thanks