hello mark, and welcome.
you might want to give SID a call at droppedaxles.com
http://droppedaxles.com/CONTACT_INFO.htmli have his front axle in my truck, and he buys up all the old straight axles and spindles that he can find.
i bet that he would have what you need.
and please, post some pics of your 46... it sounds cool.
leonard