For sale is a KO Lee B885 Raduis Grinding Attachment. While it is grimy, and probably has a bit of rust under grime, the rust is minimal and all parts seem to move fine. The hole seem to be a Brown and Sharp taper. In another auction, I have a B&S tapered 5C collet chuck. The chuck does NOT fit this attachment because it is a smaller taper, but you can get a B&S adaptor on ebay. I cannot guarantee any kind of fit for any particular application.