Doug has them.
http://www.penn.itgo.com/
Or you can try here.
He might make them.
http://www.ebay.com/itm/Vintage-Antique-CHRIS-CRAFT-PULL-START-KNOB-with-metal-insert-Outboard-Motor-/131672578649?hash=item1ea84c1a59:g:iygAAOSwHnFVrBMN
A "Boathouse Repair" is one thats done without having tools or the skills to do it properly.