I am looking for knockdown fittings, aka cam connectors or minifix fittings (see http://www.rockler.com/ecom7/findprod.cfm?sku=2334 for example). Problem is, I can't find the connector size I need - 1/4" or 10cm. A number of hardware stores sell the 1/2" or bigger, but I can't find any smaller sizes. Can anyone help?

Thanks!

Mitch