Shopping for a Rosette Maker?

I'm trying to locate what I call a rosette maker. It consists of a flat disk, 66mm diameter with a raised edge approx 2mm on both sides of the disc and two separate rings that actually fit over the raised edge of the bottom disk. I use it to make perfect circles from pleated ribbon.

I have one I purchased through eBay and I desperately need at least one more, but would be prepared to purchase several if need be. I have a feeling they may be available in the USA. There's nothing like it here in Australia. The one I have has the words "BRUNA VENTURA C.A 93006, USA and PAT PENDING". The photo only shows one ring, but there are two in the set and the disc is discoloured from constant use. It's made from a cream colour, hard plastic type material.

By Lois D