Where can I find replacement Cocobola handles for stanley planes. I have a #3, #5, and #7 type 11 planes that I would like to replace the wood on. First let me say that I think I remember the type # correctly. They have 3 dates, and no markings on the frogs. They also have the low front knobs without the rings that the knob sits in, which makes most replacement knobs not fit. Thanks for your help.

Jimmy