HI Heath.
1932 chev steering columns and box are not much easier to find or repair in RHD configuration than your 1932 Pontiac steering box.
I would suggest that you contact "The steering King" here in Sydney , as they advertise that they will repair any steering box.
If you wanted to still change over to a chev steering box , parts are difficult to find for most 1930,s steering boxes, but you may be able to find a decent used one from the mid 30's to use, but still may need bearings and bushes anyway,